No, it is an adjective in the majority of uses.
No, the word 'younger' is an adjective; the comparative form of the adjective 'young' (young-younger-youngest).
Youngest is an adjective.
younger and the youngest
Youngest is an adjective.
I married his youngest sister pronouns -- I , his verb -- married adjective -- youngest noun -- sister
youngest
No youngest is a superlative adjective. The -est ending is a good clue.Others are:biggest / tallest / hottest / warmest
The word 'younger' is the comparative form of the adjective young: positive: young comparative: younger superlative: youngest The noun form for the adjective young is youngness. The word young is also a noun (plural only); a word a group of offspring; young children and young people in general. Another noun form is youngsters.
It is an adjective.It is a an adjective.
A word is a thing. The word 'word' is a noun.
The word this is a demonstrative adjective.