Admiral of the Fleet (nautical rank)

(military, historical) Short for 大日本帝国海軍.

(military, historical) 大日本帝国海軍 / (military) 海上自衛隊

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

airbase (military airport)

Used other than figuratively or idiomatically: see 基地, 外.

(Internet slang) Eye dialect spelling of 気違い.

secret base (of the military, of children, etc.)