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"firm" is also used as a crossword clue. If that's what you saw, the answer is often uncompromising (14 letters).
Definitions
with resolute determination
Word origin
From Middle English ferme, from Old French ferme, from Latin firmus (“strong, steady”). Doublet of dharma.
Used in a sentence
“It's good to have a firm grip when shaking hands.”
“a firm believer; a firm friend; a firm adherent”
“firm favourites”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Solid, not soft”4 letters
02“Strong and steady”4 letters
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