n. The act of exerting, or putting into motion or action; the active exercise of any power or faculty; an effort, esp. a laborious or perceptible effort; as, an exertion of strength or power; an exertion of the limbs or of the mind; it is an exertion for him to move, to-day.
[mu](int) (1) (arch) unh (sound of physical exertion); oof; (2) wow; whoa; (3) (See うむ) yes; yeah; uh-huh; (aux-v) (4) (after a -nai stem) probably; (5) will; intend to; (6) would like to have done (for me)[Add to Longdo]
[いちばくじっかん, ichibakujikkan](exp) (1) bursts of exertion will fail to bear fruit if interrupted by long periods of idleness; (2) strenuous efforts, unless sustained, are to no avail (Mencius)[Add to Longdo]