字眼

wording

letter / symbol / character / word / CL:個|个[ge4] / courtesy or style name traditionally given to males aged 20 in dynastic China

eye / small hole / crux (of a matter) / CL:隻|只[zhi1],雙|双[shuang1] / classifier for big hollow things (wells, stoves, pots etc)

to be fastidious about phrasing, diction, or choice of words

erhua variant of 摳字眼|抠字眼[kou1 zi4 yan3]