The wheel came off. In the above sentence, the word "Off" is a/an:
The wheel came off. In the above sentence, the word "Off" is a/an:
Explanation
Several words are sometimes used as adverbs or sometimes used as prepositions.
A word is a preposition when it governs a noun or a pronoun, It is an adverb when it does not.
The wheel came off. “Off” is an adverb here
He jumped off the train. “Off” is a preposition here