tocar
/toˈkaɾ/ · A1 · verb
to touch
🎸 tocar = touch: you touch the strings to play, and your turn touches you
Tocar and English touch share a root (Old French tochier, from Vulgar Latin toccare, to knock or strike). Touching an instrument plays it. Me toca means it touches me, so it falls to me: it is my turn.