What is what part of speech is under?

Under can be used as various parts of speech, depending on how it is used in a sentence:

1. Preposition: When used as a preposition, under shows a relationship between two elements in a sentence. For example, "The book is under the table."

2. Adverb: Under can also be used as an adverb to indicate a position or state that something is below or beneath something else. For example, "She found her keys under the bed."

3. Adjective: In some cases, under can be used as an adjective to describe something that is located beneath or below something else. For example, "The under layer of the cake was chocolate."

4. Prefix: Under can also be used as a prefix to form compound words, such as understanding, undernourished, underestimate, etc.