細さい心しんさいしんCommon word›Freq.FrequencyTop 50,000Meanings1na-adjective, noun which may take the genitive case particle 'no', nounmeticulous; very careful; scrupulous; prudentDescribes careful, detail-oriented attention that avoids mistakes or risk. Especially common as 細心の注意を払う, meaning to exercise the utmost care.