descansar
/deskanˈsaɾ/ · A2 · verb
to rest, relax
🛋️ des + cansar = un-tire: to rest is to undo being tired
Cansar means to tire, and des- reverses it, like English un- or dis-. So descansar literally says to un-tire yourself. Same pattern as cansado (tired) and descanso (a rest, a break).