neopatrnýcareless, incautious, unwary
opatrnýcareful, cautious, heedful, vigilant, wary, prudent, guarded, cagey, circumspect, noncommittal, softly-softly
být: Měl bys být opatrný.You should be careful.
caution: exercise cautiondávat (si) pozor, být opatrný
minded: money-mindedopatrný na korunu