Where does “cage bird” come from?

cage bird (English) comes from English Cage, from Middle English cage, from Old French cage, from Latin cavea, from Latin cavus, from Proto-Italic kawos, from Proto-Indo-European ḱowh₁ós, from Proto-Indo-European ḱewh₁- — to swell; to be strong.

cage bird (English): A bird, such as a canary or budgerigar, kept captive in a cage or aviary for domestic companionship or as a hobby

Definitions

  1. A bird, such as a canary or budgerigar, kept captive in a cage or aviary for domestic companionship or as a hobby

Ancestry of “cage bird”, step by step

cage bird traces back through two separate lines of ancestry.

via English Cage

StepLanguageWordMeaning
1EnglishCageAn enclosure made of spaced bars, normally to hold animals while providing some ventilation
2Middle EnglishcageA cage or pen; A cell, enclosure or room of...
3Old Frenchcage
4Latincaveahollow, cavity; cage, den, enclosure, stall,...
5Latincavushollow, concave; excavated, channeled;...
6Proto-Italickawos
7Proto-Indo-Europeanḱowh₁óshollow
8Proto-Indo-Europeanḱewh₁-to swell; to be strong

via English bird

StepLanguageWordMeaning
1EnglishbirdA member of the class of animals Aves in the...
2Middle Englishbrida young bird, a bird in general; Alternative form...
3Old Englishbriddyoung bird, chick; chicken
Every word from Proto-Indo-European ḱewh₁-