English oakum

← Old English ācumba (inherited)

← Old English ācemban (mention)

← English out (mention)

← English comb (mention)

← Middle English okome (inherited)

← Proto-Germanic *uz- (derived)

← Proto-Germanic *kambijaną (mention)

← Proto-Indo-European *uds- (derived)

← Proto-Indo-European *ūd- (mention)

← Proto-Indo-European *ǵombʰ- (mention)

← Proto-Indo-European *ǵembʰ- (mention)

→ English hards (link)