indefenso
/indeˈfenso/ · B2 · adj
defenseless
🐣 in- (not) + defenso (defended) = not defended, so defenseless
Same Latin root as English defend and defense. The prefix in- means not, as in inútil (useless). Adding it to defenso gives in-defenso, not defended. It is a near twin of the English word indefensible.