冗談
じょうだん · joudan · JLPT N3 · noun
joke
🤡 冗談 = superfluous (冗) + talk (談): idle extra talk, i.e. a joke
冗 means excess or unnecessary, as in 冗長 (redundant, long-winded). 談 means talk, as in 相談 (consultation) and 会談 (talks). Talk that serves no serious purpose is a joke. Common in 冗談でしょう: you must be joking.