The word "hidden" is the past tense of an irregular verb.
The word "hidden" is the past tense of an irregular verb. To determine this, you can identify irregular verbs by looking for any changes in the base form of the verb when it is used in the past tense. In this case, the base form of the verb is "hide," and the past tense is "hidden." Regular verbs, on the other hand, simply add "-ed" to the end of the base form to form the past tense. Therefore, "hidden" stands out as the irregular past tense verb in this set of responses.
