Where does “crossbill” come from?

crossbill (English) comes from English Bill, from Middle English bill, from Old English bil, from Frankish billi, from Proto-Germanic bilją, from Proto-Germanic harjaz, from Proto-Indo-European kóryos, from Proto-Indo-European ḱer- — army.

crossbill (English): Any of various finches of the genus "Loxia",...

Definitions

  1. Any of various finches of the genus "Loxia",...

Ancestry of “crossbill”, step by step

crossbill traces back through two separate lines of ancestry.

via English Bill

StepLanguageWordMeaning
1EnglishBillA nickname for the British constabulary. Often called "The Bill" or "Old Bill"
2Middle Englishbill
3Old Englishbila kind of sword or other bladed weapon,...
4Frankishbilli
5Proto-Germanicbiljąa cutting implement; blade; axe; sword; spike;...
6Proto-Germanicharjazarmy; army leader; commander; warrior
7Proto-Indo-Europeankóryoswar; troops; army; war, troops
8Proto-Indo-Europeanḱer-to grow, to make grow, to nourish; to plait,...
9Proto-Indo-Europeankr̥-to turn, to bend
10Proto-Indo-Europeanker-army

via English cross

StepLanguageWordMeaning
1EnglishcrossA geometrical figure consisting of two straight...
2Frenchcroixcross; a representation of a cross; the cross as...
3GermanKreuzcross; clubs; sharp
4SpanishCruzcross
5Portuguesecruzcross
6Italiancrocecross
7Latincruxwooden frame on which criminals were crucified,...
8Proto-Italic*kruks
9Proto-Indo-Europeansḱer-to caw, crow
Every word from Proto-Indo-European ker-