一丝不苟 Traditional 一絲不苟 yī sī bù gǒu 🔊 not one thread loose (idiom) HSK 7–9 + Keep this word Meanings yī sī bù gǒu 一絲不苟 not one thread loose (idiom); strictly according to the rulesmeticulousnot one hair out of place Its characters 一yīoneHSK 1丝sīsilkHSK 7–9不bùnot; noHSK 1苟gǒuif indeed