IPA: /ˈtruːəntli/
KK: /ˈtruːəntli/
In a way that shows someone is absent from school or duty without permission.
He was truantly wandering the streets instead of attending class.
Truantly → It is formed from "truant" (from Old French *truant*, meaning one who is absent without permission) and the suffix "-ly" (meaning in a manner of). The word "truantly" means in a manner that is absent without permission, typically referring to skipping school or duties.
Think of someone being 'absent without permission' — that's what truantly means, and the '-ly' just indicates the manner of being absent.