一丝不苟

yìsī-bùgǒu
not one thread loose, strictly according to the rules
HSK 79
Traditional一絲不苟

Additional Dictionary Meanings

not one thread loose (idiom); strictly according to the rulesmeticulousnot one hair out of place

Characters (4)

一oneHSK 1丝silk, thread-like thingHSK 79不not, noHSK 1苟not one thread loose, strictly according to the rulesHSK 79