Implacable (adjective) — عنيد أو لا يُسترضى: Unable to be calmed or changed. Below are 8 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
Never stopping or becoming less severe. A relentless person, storm, or effort keeps going without rest, mercy, or pause. Not relent (to ease off), not relevant…
Unwilling to change; not able to bend.
Showing no mercy; cruel.
Unwilling to make concessions.
Refusing to change one's mind or be persuaded; completely firm in a decision.
unyieldingunappeasablestern