IPA: /ˈpɛtɪli/
KK: /ˈpɛtɪli/
In a way that shows a lack of importance or seriousness, often focusing on trivial matters.
She argued pettily about the color of the napkins instead of discussing the main issue.
Pettily → It is formed from "petty" (from Old French *petit*, meaning small or little) and the suffix "-ly" (meaning in a manner of). The word "pettily" means in a small or trivial manner.
Think of 'petty' meaning small or trivial, and remember that 'pettily' describes doing something in a small or trivial way.