IPA: /ˈfeɪθfəli/
KK: /ˈfeɪθfəli/
In a way that shows loyalty or support, often used to describe how someone keeps promises or commitments.
She faithfully attended every meeting to support her team.
Faithfully → It is formed from "faith" (from Old French *feid*, meaning trust or belief) and "-fully" (meaning in a manner full of). The word "faithfully" means in a manner full of trust or belief.
Think of having 'trust' ('faith') and doing something 'in a full manner' ('-fully') — that's why faithfully means doing something with full trust.