"Brightened" is a verb, specifically the past tense and past participle form of the verb "brighten." It describes the action of making something brighter or more cheerful. In a sentence, it can function as a main verb or as part of a verb phrase.
Brightened?
adverb
what part of speech is beneath
i want to know what part of speech is camping
The part of speech is a adjective
Brightened.
Brightened Sunsets - 1913 was released on: USA: 24 May 1913
frightened, brightened
Brightened?
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "twirl" is a verb.