tittle
/ˈtɪtl/noun
in sing.
- a tiny amount or part of something一点点, 微量：
the rules have not been altered one jot or tittle since.
从此以后这些规则丝毫未有改变。
词源
late Middle English.: from Latin titulus （see TITLE）， in medieval Latin 'small stroke， accent'; the phrase jot or tittle is from Matt. 5:18.