Where does “head louse” come from?

head louse (English) comes from English head, from English -y, from Middle English -y, from Old English -iġ, from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

head louse (English): A parasitic insect, Pediculus humanus capitis, which lives among the hairs on the head of a human and feeds on blood

Definitions

  1. A parasitic insect, Pediculus humanus capitis, which lives among the hairs on the head of a human and feeds on blood

Ancestry of “head louse”, step by step

head louse traces back through two separate lines of ancestry.

via English head

StepLanguageWordMeaning
1EnglishheadThe part of the body of an animal or human which...
2English-yAdded to nouns and adjectives to form adjectives...
3Middle English-yDesignates an adjective, in many cases formed by...
4Old English-iġ-y, -ic
5Proto-West Germanic-gForms adjectives from nouns and verbs with a...
6Proto-Germanic-gaz-y
7Proto-Indo-European-ḱos-y, -ic

via English louse

StepLanguageWordMeaning
1EnglishlouseA small parasitic wingless insect of the order...
2Middle Englishlouslouse; A person or thing worthy of contempt or...
3Old Englishlūslouse
4West Germanic*lūs
5Germanic*lūs
6Proto-Indo-EuropeanlewH-louse
Every word from Proto-Indo-European -ḱos
head louse — Etymology, Origin & Word History | Etymology Explorer