An adverb describes the action. Verbs are action words; adverbs describe the action. In the example "he giggled uncontrollably" 'giggled' is the verb and 'uncontrollably' is the adverb because it describes the action of giggling.
Persuaded is a verb. It describes an action.
Fester is a verb. It describes an action.
Yearning is a verb. It describes an action.
Tittle is a verb. It describes an action.
Emigrate is a verb. It describes an action.
Jumps is a verb. It describes an action.
Working is a verb. It describes an action.
Forgave is a verb. It describes an action.
Shone is a verb. It describes an action.
Exchanged is a verb. It describes an action.
Persuaded is a verb. It describes an action.
Fester is a verb. It describes an action.
Yearning is a verb. It describes an action.
Tittle is a verb. It describes an action.
Emigrate is a verb. It describes an action.
Settled is a verb. It describes an action.
Convene is a verb. It describes an action.