Loud vs. Loudly – Which is Correct?
Both “loud” and “loudly” are correct, but they serve different grammatical roles. Use “loud” mainly as an adjective describing a sound, person, or action, and sometimes as an adverb after verbs such as “sing” or “play.” Use “loudly” as an adverb when emphasizing how an action happens in a sentence.
Because sound-related wording can be confusing, compare Aloud vs. Out Loud when choosing between similar expressions.
loud or loudly – Which is Correct?
Both “loud” and “loudly” are correct. The main difference is grammatical. Loud is usually an adjective that describes a noun: “a loud alarm.” It can also function as an adverb in informal or everyday English, especially after verbs involving sound: “They laughed loud.”
Loudly is the standard adverbial form. It modifies a verb and explains how an action is performed: “They laughed loudly.” In formal writing, loudly is often the safer choice when you need an adverb.
The Best Trick to Remember the Difference
Use the “What is it describing?” test. If the word describes a person, object, or sound, choose loud: “a loud speaker” or “the music is loud.” If it describes an action, choose loudly: “The speaker talked loudly.”
A useful swap test is to replace the word with quiet or quietly. “The engine is quiet” requires the adjective quiet, so “The engine is loud” is correct. “She spoke quietly” uses the adverb quietly, so “She spoke loudly” is the matching construction.
| Word | Part of Speech | Meaning | Example |
|---|---|---|---|
| loud | Adjective; sometimes adverb | Producing or having a strong sound; in an audible or forceful way | The alarm is loud. |
| loudly | Adverb | In a loud manner | The audience applauded loudly. |
How to Use loud
Loud is most commonly an adjective. It describes sounds, voices, music, machines, colors, clothing, or behavior that is unusually strong, intense, or noticeable. It commonly follows linking verbs such as be, seem, and sound, or appears before a noun.
Loud can also be used as an adverb in informal and conversational English. This use is especially common with verbs such as talk, laugh, sing, read, and play. In formal writing, however, loudly may sound more precise when the word directly modifies an action.
Example 1: The thunder was so loud that it shook the windows.
Example 2: We could hear a loud conversation from the next room.
Example 3: The children laughed loud enough for everyone to hear.
What are the different forms of loud?
Loud is a gradable adjective, so it has comparative and superlative forms. The comparative form is louder, and the superlative form is loudest. The adverbial form loudly is also commonly used when describing an action.
- Positive: The radio is loud.
- Comparative: The radio is louder than the television.
- Superlative: That was the loudest concert I have attended.
- Adverb: The crowd cheered loudly.
Etymology of the word loud
Loud comes from the Old English word hlūd, meaning “noisy,” “having a strong sound,” or “famous.” It is related to words in other Germanic languages, including German laut. Over time, its meaning expanded beyond physical sound to describe conspicuous behavior, bright colors, and styles that attract attention.
How to Use loudly
Loudly is an adverb formed from the adjective loud with the suffix -ly. It modifies an action and indicates that something is done with considerable volume or force. It is particularly useful when the sentence focuses on the manner of speaking, laughing, singing, crying, shouting, or making another sound.
Loudly is grammatically standard in both formal and informal English. It can sometimes sound more deliberate or emphatic than the adverbial use of loud.
Example 1: The audience applauded loudly after the performance.
Example 2: She spoke loudly so that the people at the back could hear.
Example 3: The baby cried loudly during the flight.
Etymology of the word loudly
Loudly is a transparent formation consisting of the adjective loud and the adverb-forming suffix -ly. The suffix comes from Old English -līċ, meaning “in the manner of” or “like.” Therefore, loudly literally means “in a loud manner.”
Related Concepts
Understanding adjectives, adverbs, and linking verbs makes the difference between loud and loudly much easier to recognize.
- Adjectives: Adjectives describe nouns or pronouns. In “a loud engine,” loud describes the noun engine.
- Adverbs: Adverbs can describe verbs and explain how an action occurs. In “The engine ran loudly,” loudly describes the verb ran.
- Linking verbs: Verbs such as be, seem, and sound connect a subject with a description. This is why “The music sounds loud” is correct rather than “The music sounds loudly.”
- Adverbial adjectives: Some adjectives, including loud, can also act as adverbs in informal expressions such as “laugh loud” and “sing loud.”
Examples from Media and Literature
The distinction appears frequently in titles, narration, dialogue, reviews, and everyday descriptions across popular culture.
- Literary titles: The title The Loudest Voice uses loudest, the superlative form of the adjective loud, to describe a voice with exceptional volume or influence.
- Music journalism: A review might describe a performance as “a loud, energetic concert,” using loud to modify the noun concert.
- Film dialogue: A character may say, “Don’t speak so loudly,” using loudly to explain how the person is speaking.
- News reporting: A report could state, “Protesters shouted loudly outside the building,” where loudly modifies the action shouted.
- Everyday storytelling: Someone might say, “The dog barked loud,” in casual speech, although “The dog barked loudly” is generally preferred in formal writing.
Practice Exercises
Choose the correct word to complete each sentence: loud or loudly.
- The fire alarm was extremely _____.
- The students read their lines _____ during rehearsal.
- That motorcycle is much _____ than mine.
- The crowd cheered _____ when the team scored.
- The music sounds too _____ for this small room.
Answer Key
- loud — It describes the fire alarm.
- loudly — It describes how the students read.
- louder — It is the comparative form of loud.
- loudly — It describes how the crowd cheered.
- loud — It follows the linking verb sounds and describes the music.
loud Synonyms
| Synonym | Definition |
|---|---|
| Noisy | Producing a lot of sound or disturbance |
| Booming | Deep, powerful, and resonant in sound |
| Thunderous | Extremely loud and often deep or dramatic |
| Blaring | Very loud, harsh, and difficult to ignore |
| Deafening | So loud that hearing is temporarily affected |
loudly Synonyms
| Synonym | Definition |
|---|---|
| Noisily | In a way that creates a lot of noise |
| Boisterously | In a lively, energetic, and noisy manner |
| Vociferously | In a loud and forceful way, especially when expressing an opinion |
| Sh rill y | In a high-pitched, piercing manner |
| Audibly | In a way that can be heard |
Frequently Asked Questions
Question 1: Is “loud” or “loudly” correct?
Both words are correct. Use loud mainly as an adjective, and use loudly as an adverb to describe how an action occurs.
Question 2: Is “sing loud” grammatically correct?
“Sing loud” is acceptable in informal English, particularly in conversation, lyrics, and expressions such as “sing out loud.” In formal writing, “sing loudly” is usually the more conventional choice.
Question 3: Should I write “speak loud” or “speak loudly”?
“Speak loudly” is the standard choice when the word modifies the verb speak. “Speak loud” is common in casual speech but may sound less polished in formal or professional writing.
Conclusion
Loud and loudly are both correct, but they typically perform different jobs. Use loud to describe a sound or noun, especially after linking verbs such as sound and be. Use loudly to describe how someone performs an action. Pro tip: choose loudly in formal writing when modifying a verb directly, because precise word choice strengthens your professional reputation.
