Wandered is the past participle of wander.
Yes, it is a form of the verb "to roam" (to move about or wander). It is the past tense and the past participle of the verb.
No, it is not an adverb. wandered is the past tense (and past participle) for the verb "to wander." It may be used as an adjective and one of the adverb forms is wanderingly.
The past participle of "do" is "done." The past participle of "have" is "had."
The past participle of "am not" is "have not been."
The past tense of wander is wandered.
The past participle of "do" is "done."
The past tense of "have" is "had," and the past participle is also "had."
The past participle of the word "have" is "had."
The past participle of "am, are, is" is "been."
The past participle of "will" is "willed."
The past participle is thought.
The past participle of "to" is "been." The past participle of "be" is also "been."