Intermediate (B1)
IPA: /ˈfeɪθfəl/
KK: /ˈfeɪθfəl/
Definition
Being loyal and devoted to someone or something, or being true to the facts or reality.
Example
She has always been a faithful friend, supporting me through thick and thin.
Conversation

I really appreciate how faithful you are as a friend.

Of course! I believe loyalty is super important.

It makes me feel secure knowing I can count on you.

And I feel the same way; being faithful to friends is essential.
Synonyms & Antonyms
Antonyms
unfaithful
disloyal
treacherous
Definition
A person who is loyal and devoted to someone or something, often used to describe a follower or supporter.
Example
The faithful gathered at the church to celebrate the holiday together.
Conversation

I really admire how faithful your friends are to you.

Thanks! They've always been there for me, no matter what.

It's great to have such a solid group of faithful people around you.
Root Explanation
Faithful → It is formed from "faith" (from Old French *feid*, meaning trust or belief) and "-ful" (meaning full of). The word "faithful" means full of faith or trust.
Memory Tip
Think of being 'full of trust' — 'faith' means trust, and '-ful' means full of.
Visually Confused Words
unfaithful
faintful
fitful
unfaithfully
pithful
overfaithful
oathful
fistful