A participle is a verb acting as a (n) ___.

adjective

adverb

noun

The answer is adjective.

Explanation:

Participle is a non-finite verb form that doesn't have the function of the verb, but as a noun modifier, that means that its primary function is function of an adjective.

There are two types of participle - present participle and perfect participle. Present participle ends on - ing, the ending of perfect participle depends on whether the verb is regular or irregular; its form we can find in the third colon of conventional verb naming (to see - saw - seen; to play - played - played).

For example:

I met a singing man.

She solved a complicated puzzle.

They visited a forbidden place.