Yes, it is a adjective.
no it's a verb
NO but in the sentence "Use of the word "in" as an adjective is IN these days" the IN is an adjective
Smoking is known to be deleterious to your health.
by adjective in the sentence
In the sentence "He saw how eager she was to do her best," the adjective is "eager." This word modifies (describes) the word "she."
The word "vacation" is not an adjective in the sentence provided.
Some is an adjective.
It's the word that describes the noun in the sentence.
There is no adjective in your sentence. An adjective is a descriptive word of a verb or noun. Nothing is being described in your sentence.
An adjective describes a noun.
Subconcious is an adjective.
An adjective is a word that describes a noun or a verb. An example of a sentence that uses the word "abstract" in a sentence as an adjective would be: It is difficult for children to fully comprehend many abstract ideas.