صارم

Etymology
of, from.

Adjective

 * 1) sharp, acute, keen (of an edge or point)
 * 2) harsh, inflexible, rigorous, stern, strict
 * 3) absolute, categorical, decisive, definitive, firm, unflinching, unwavering

Etymology
From.

Adjective

 * 1) who cuts through or off
 * 2) sharp, trenchant
 * 3) decided, who acts with courage and decision