1. 极狭的,窄如发丝的：clock radio 有定时自动开关功能的收音机,收音机闹钟 | hairsbreadth 极狭的,窄如发丝的 | continuous permafrost zone [地质]连续永冻土带
2. 极狭的：hairpin 簪 | hairsbreadth 极狭的 | hairsplitter 拘泥于琐事的人
3. 间不容发的宽度：hairpin /发夹/钗/簪/ | hairsbreadth /间不容发的宽度/ | hairsplitter /拘泥于琐事的人/强词夺理的人/
4. 间不容发, 千钧一发 (名)：hairsbreadth 间不容发, 千钧一发 (名) | hairsplitter 拘泥于琐事的人; 强词夺理的人 (名) | hairsplitting 拘泥于细节 (名)
noun
1. a very small distance or space
e.g. they escaped by a hair's-breadth
they lost the election by a whisker
Synonym: hair's-breadth hair whisker