decidir
/deθiˈdiɾ/ · A1 · verb
to decide, to make up one's mind, to determine, to choose to
✂️ Latin de + caedere = to cut off: deciding cuts away the other options
Same root as English decide, so the meaning carries over directly. The -cid- piece means cut, as in scissors, incision and concise. Spanish c before i is /θ/, so say de-thi-DEER with stress on the last syllable.