work done for free, unpaid work, uncompensated work / work done in vain, work with no favorable end result

to work for free, to work without pay or other compensation / to work in vain, to work with no favorable end result

(archaic, grammar) any word that declines or conjugates / (archaic, grammar) more specifically, a verb

volunteer fire department

those who do not work should not eat

a pilot (person in charge of the controls of an aircraft)

(medicine) male nurse

warrior (person actively engaged in battle, conflict or warfare)

Kyūjitai form of 士気: morale, esprit de corps

a male given name