Where does “jailbait” come from?

jailbait (English) comes from English jail, from Middle English gayole, from Old French gaiole, from Medieval Latin gabiola, from Late Latin caveola, from Latin cavea, from Latin cavus, from Proto-Italic kawos — to swell; to be strong.

jailbait (English): A sexually mature person below the legal age of...

Definitions

  1. A sexually mature person below the legal age of...

Ancestry of “jailbait”, step by step

jailbait traces back through two separate lines of ancestry.

via English jail

StepLanguageWordMeaning
1EnglishjailA place or institution for the confinement of...
2Middle Englishgayolejail, prison place for [[confine
3Old Frenchgaioleprison; gaol; jail
4Medieval Latingabiola
5Late Latincaveola
6Latincaveahollow, cavity; cage, den, enclosure, stall,...
7Latincavushollow, concave; excavated, channeled;...
8Proto-Italickawos
9Proto-Indo-Europeanḱowh₁óshollow
10Proto-Indo-Europeanḱewh₁-to swell; to be strong

via English bait

StepLanguageWordMeaning
1EnglishbaitAny substance, especially food, used in catching...
2Middle EnglishbayteBait or lure; objects used as a bait or lure;...
3Old Norsebeitato graze; to allow, let, make bite; to steer or...
4Proto-GermanicbaitōThat which is or can be bitten; food; bait
5Proto-Indo-Europeanbʰeyd-to split
6Proto-Indo-Europeanbʰey-bee
Every word from Proto-Indo-European ḱewh₁-Every word from Proto-Indo-European ḱowh₁ósEvery word from Proto-Italic kawos