1.
fighting spirit; vigor; enthusiasm; psyching oneself up
A surge of mental energy, willpower, or determination. Originally from martial arts, where it refers to the focused energy expressed through a shout (kiai) before or during a strike. Now widely used in everyday speech to mean putting one's heart and energy into something.
Usage
Originally a martial arts term for the focused shout accompanying a strike, 気合い has become a widely used everyday word meaning mental energy and determination. The key phrase 気合いを入れる means "to psych oneself up" or "to put one's energy into it," while 気合いが入る describes the state of being fired up.