Meaning

noun a playing card in the major suit that has one or more black figures on it

noun a sturdy hand shovel that can be pushed into the earth with the foot

noun (ethnic slur) extremely offensive name for a Black person

originProbably from Italian spade, plural of spada (“the ace of spades”, literally “sword, spade”), from earlier *spata, from Latin spatha, from Ancient Greek σπᾰ́θη (spắthē). Cognate with Etymology 1. So called for the shape, though what the shape was exactly meant to represent has been debated.

Etymology from Wiktionary, CC BY-SA 3.0