IPA: /ˈtʃeɪstli/
KK: /ˈtʃeɪstli/
In a way that is pure, modest, or morally good, often relating to behavior or appearance.
She dressed chastely for the formal event, choosing a simple and elegant outfit.
Chastely is formed from "chaste" (from Latin "castus", meaning pure or unblemished) and the suffix "-ly" (meaning in a manner of). The word "chastely" means in a manner that is pure or virtuous.
Think of 'chaste' meaning pure, and remember that 'chastely' describes acting in a pure or virtuous way.