Word: 一丝不苟 (yīsībùgǒu) Traditional: 一絲不苟 一丝不苟 dictionary entry yīsībùgǒu not one thread loose (idiom); meticulous; not one hair out of place Full dictionary entry for 一丝不苟 Example sentences using 一丝不苟 2 sentences, showing page 1 of 1. 他执行规定一丝不苟。 Tā zhíxíng guīdìng yìsībùgǒu. He follows the rules strictly to the letter. 会计工作一丝不苟。 Kuàijì gōngzuò yìsībùgǒu. The accountant's work is meticulous.