Uncompromising (adjective) — غير متساهل: Unwilling to make concessions. Below are 7 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
Unwilling to change; not able to bend.
Stiff and unable to bend; strict and unwilling to change.
Determined and unwavering.
firmunyieldingstrictunbending
showing open resistance or bold disobedience; characterized by a refusal to obey authority or conform to established norms, often in a bold or aggressive manner
Unable to be calmed or changed.