PIE *gembh, bite, toothから。語源的にはgem, toothed crystal, gemと同じ。
英語の語源
comb
comb: [OE] Comb is an ancient word, which has been traced back to an Indo-European *gombhos. This appears to have signified ‘tooth’, for among its other descendants were Sanskrit jámbhas ‘tooth’ and Greek góphos ‘pin, tooth’. In prehistoric West and North Germanic it became *kambaz, which produced English comb, German kamm, and Dutch kam (probably borrowed into English in the 18th century as cam, originally ‘projecting cog-like part on a wheel for transferring motion’).
The Old English verb formed from comb lasted dialectally as kemb until the 19th century, but today it survives only in unkempt. The origin of the word’s application to honeycomb, first recorded in the 13th century, is not known. => oakum, unkempt
comb (n.)
Old English camb "comb, crest, honeycomb" (later Anglian comb), from Proto-Germanic *kambaz (cognates: Old Saxon and Old High German camb, German Kamm, Middle Dutch cam, Dutch kam, Old Norse kambr), literally "toothed object," from PIE *gombhos, from root *gembh- "to bite, tooth" (cognates: Greek gomphos "a molar tooth," Sanskrit gambha-s "tooth").
comb (v.)
late 14c. (implied in past participle kombid), verb derived from comb (n.); replacing the former verb, Old English cemban, which however survives in unkempt. Related: Combed; combing.
例文
1. We went over that area with a fine-tooth comb .
私たちはその地域を徹底的に捜索した。
2.Your hair needs a good comb .
あなたの髪はきちんと整えなければなりません。
3.She bent to retrieve her comb from the floor.
彼女は腰をかがめて地面から櫛を拾った。
4.Your hair 's so tangled that I can 't comb it.
あなたの髪は乱れすぎて、私は結べません.
5.Don 't forget to comb your hair before you go out.