ʾāmēṣ אָמֵץ ‘to strengthen’ (Hebrew)

Etymology^?: a primitive root

ʾāmēṣ v
1) to be strong, alert, courageous, brave, stout, bold, solid, hard
 1a) (Qal) to be strong, brave, bold
 1b) (Piel) to strengthen, secure (for oneself), harden (heart), make firm, make obstinate, assure
 1c) (Hithpael) to be determined, to make oneself alert, strengthen oneself, confirm oneself, persist in, prove superior to
 1d) (Hiphil) to exhibit strength, be strong, feel strong