caca

From cack (“to defecate in (one's clothes), crap one's pants”), or from Middle English cakken, from Old English *cacian, from Old English cac (“dung; excrement”); either way, ultimately from Latin cacare (“to shit, defecate”). Cognate with English cack. Compare Latin cacō (“to defecate”), French caca (“excrement”), Basque kaka (“excrement”), Lithuanian kaka (“excrement”), Hungarian kaka (“excrement”), Italian cacca, Ancient Greek κάκκη (kákkē, “dung”), German kacken, Irish cac, Welsh cach, Cornish caugh, Breton cac'h, Aromanian cac, Scottish Gaelic cac, Romanian căca, Spanish caca (“excrement”).

来源：wiktionary