oakum
Oakum (noun) means Rough fibres combed out of flax or hemp while preparing it for spinning.
Etymology
Came into English from Late Middle English okom, okome (“oakum”), and other forms, which developed from Old English ācumba (“oakum”, literally “that which has been combed out, off-combings”), and other forms, from ācemban (“to comb out”). This in turn goes back to Proto-Germanic *uz- (from Proto-Indo-European *ud-s-, *ūd- (“out; up”), or *h₂ew- (“away from, off”)) plus *kambijaną (“to comb”), ultimately from *ǵómbʰos (“row of teeth; tooth; peg”), *ǵembʰ- (“nail; tooth; to gnaw through; to pierce”). See also out and comb.