Uncertain. Probably a substratum word. Other theories include a Latin root *curtiāre ("cut"), *cruciāre ("cross") or *curatiāre or a connection with Slavic krotiti (compare ocroti).
a cruța (third-person singular present cruță, past participle cruțat) 1st conj.
- to spare, pardon, forgive
- to take care of oneself/health, not overwork onself