This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Unwilling to grant concessions or negotiate; inflexible: took an uncompromising stance during the peace talks.

adj. inflexible and unwilling to negotiate or make concessions

adj. principled

adj. Not admitting of compromise; making no truce or concessions; obstinate; unyielding; inflexible.

Not compromising; admitting of no compromise; not complying; inflexible; unyielding: as, uncompromising hostility.

adj. not making concessions

"Now, however, the truth is set out in uncompromising terms."

hard-line    hardline   

obstinate    unyielding    inflexible    strict   

resolute    unyielding    unflinching    stubborn    fanatical    passionate    merciless    manly    ruthless    steadfast