Lexical Definition

‎אָמַץ‎ ʼâmats (aw-mats') to strengthen ^H:V
a primitive root

confirm, be courageous (of good courage, stedfastly minded, strong, stronger), establish, fortify, harden, increase, prevail, strengthen (self), make strong (obstinate, speed).

• to be alert, physically (on foot) or mentally (in courage)

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

See Greek: ἀνδρίζομαι · ἀνθίστημι · ἀνίστημι · ἀποστρέφω · ἐνισχύω · ἐρείδω · ἰσχυρός · ἰσχύς · ἰσχύω · κατισχύω · κραταιόω · κρατέω · παρακαλέω · περιτίθημι · σπεύδω · στερεόω · ὑπερέχω · φθάνω