it is an adjective in the comparative form
"Retired" is an adjective.
Posterity is a noun.
The superlative form for elder is elderest.
The correct spelling of elder in 999 is spelled as "elder."
The plural of elder is elders.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.
The part of speech for "indefinite" is an adjective.
The part of speech for "buried" is a verb.