It can be either noun, verb, adjective, or adverb. However, in some uses, the noun can be considered an adjective form. i.e. best one.
Examples:
(noun) "Of all the candidates, he was the best." (i.e. best candidate)
(noun) " He always tries to do his best."
(verb) "We will try again this week to best our rival school.
(adjective) "It was the best result that we could hope for."
(adverb) "Father knows best."
(adverb)"The system performs best when run separately."
Adjectives describe nouns, so yes, best is an adjective, as in "best friend." It is a superlative adjective, used for comparisons (good, better, best.)
a superlative
An adjective is a word that describes a noun as in green. All is not an adjective.
An Adjective...?
yes
In the sentence "He saw how eager she was to do her best," the adjective is "eager." This word modifies (describes) the word "she."
No, Swine is not an adjective, it is a noun. Swine is a type of pig.
The word "best" is a comparative (superlative) adjective, not an adverb.
The word "of" is not an adjective. It is a preposition.
The word "of" is not an adjective. It is a preposition.
An adjective is a word that describes a noun as in green. All is not an adjective.
The word "the" is an article, which is a type of adjective.
its not
An Adjective...?
yes
yes
In the sentence "He saw how eager she was to do her best," the adjective is "eager." This word modifies (describes) the word "she."
That would be an adjective.
Adjective