The word "arbitrary" is an adjective. It is used to describe something that is based on random choice or personal whim rather than any reason or system. For example, one might say, "The rules seemed arbitrary and lacked a clear rationale."
The part of speech that modifies a verb, adjective, or other adverb, Any of the words belonging to this part of speech, such as so, very, and rapidly.
Evenly is an adverb.
Adroit is an adjective.
Certainty is a noun.
Noun
The word impetuous is an adjective. It describes someone who makes arbitrary decisions.
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 for "lecturer" is a noun.
The part of speech for "indefinite" is an adjective.
The part of speech for "buried" is a verb.