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Definitions4 characters
yi1 si1 bu4 gou3
not one thread loose (idiom); strictly according to the rules/meticulous/not one hair out of place
Usage•••frequent
Pronunciations

As word

1
yi1
not one thread loose (idiom); strictly according to the rules/meticulous/not one hair out of place
2
si1
not one thread loose (idiom); strictly according to the rules/meticulous/not one hair out of place
3
bu4
not one thread loose (idiom); strictly according to the rules/meticulous/not one hair out of place
4
gou3
not one thread loose (idiom); strictly according to the rules/meticulous/not one hair out of place