IPA: /ˈoʊvərˈkɔːʃəs/
KK: /oʊvərˈkɔːʃəs/
Being too careful and not willing to take risks.
His overcautious nature made him miss out on many exciting opportunities.
Comparative: more overcautious
Superlative: most overcautious
Overcautious → It is formed from "over-" (meaning excessively) and "cautious" (from Latin "cautiosus", meaning careful or wary). The word "overcautious" means excessively careful or wary, to the point of being overly cautious.
Think of being 'excessively' ('over-') 'careful' ('cautious') — that's why overcautious means being too careful.