The veteran laughed at the new recruits.
You can use it as an adjective.
by adjective in the sentence
In a sentence.
NO but in the sentence "Use of the word "in" as an adjective is IN these days" the IN is an adjective
He is a seasoned veteran who shows a great tenacity for the game.
An adjective describes a noun.
'He was a worried boy.' In this sentence worried is describing the boy, therefore worried is an adjective.
no
apathetic is the adjective. His apathetic attitude annoys me!
The military veteran had flown older airplanes during the war.
The veteran suffered from Post Traumatic Stress Disorder (PTSD).