The word petty is an adjective. It describes something that is of little importance. For example, if you could not find a paper clip, that would be a petty loss.
The part of speech that the word my is used as is an adjective.
Adjective
The word "urban" is an adjective. It is used to describe things related to cities or city life.
The word "useful" is an adjective. It describes a noun by indicating that something has a practical purpose or is beneficial in some way.
The word "omniscient" is an adjective.
an adjective
an adjective
Former is an adjective.
It's an adjective.
The word "conspicuous" is an adjective.
The word "playful" is an adjective. It is used to describe someone or something that is full of playfulness or inclined to play.
The word 'cheaper' is a comparative adjective