Need a five-letter word

[BrickBiscuit]

I need a five-letter word which epitomises, encapsulates or complements the motto 'In arduis fidelis'. It's to accompany a crest on a display. Anyone? Thanks.

Loyal?

Tricky to do in five letters. Stout?

@Dee00 @GasperyJacquesRoberts Great start, thanks. Keep them coming. I'm sure there's something out there, the more left-field the better.

Sound
Solid
Stanch

@SeaAndStars Great, thanks. Any more?

Chat GPT says
Here are a few strong candidates:

1. Stead – as in steadfast, meaning firm and unwavering. (Though technically four letters, it has the right root and resonance.)
2. Brave – conveys courage in adversity, a close complement.
3. Loyal – directly expresses fidelis (faithful).
4. Trust – faith and reliability, another complement to fidelis.
5. Tried – as in “tested and true,” implying proven faithfulness in hardship.

✅ Best single choice: LOYAL

I'm not sure you can do any better with a single five letter word. Could you display two five letter words one above the other?

Gutsy? Tough? Depending how left field you're willing to go.

Mercy?

Stout, tough, loyal, sworn?
Pluck, heart, nerve, steel?

Thanks. Unfortunately limited to one word.

Troth

Faith

Stoic

Could you put the motto in English - “faithful in adversity” and the Latin “fidus” meaning loyal in Latin below.

Brilliant - that's it. Fidus! Thanks to all, great suggestions.