Where does “treasurous” come from?

treasurous (English) comes from English ous, from English ou, from Afrikaans ou, from Dutch oud, from Middle Dutch out, from Old Dutch ald, from Proto-West Germanic ald, from Proto-Germanic aldaz — to grow, nourish.

treasurous (English): precious; valuable

Definitions

  1. precious; valuable

Ancestry of “treasurous”, step by step

treasurous traces back through two separate lines of ancestry.

via English ous

StepLanguageWordMeaning
1Englishousplural of ou
2EnglishouA probably extinct species of Hawaiian...
3AfrikaansouAn old fellow, guy, bloke; attributive form of...
4Dutchoudold
5Middle Dutchoutold
6Old Dutchald
7Proto-West Germanicaldold
8Proto-Germanicaldazold, grown up
9Proto-Indo-Europeanh₂eltós
10Proto-Indo-Europeanh₂él-to grow, nourish

via English treasure

StepLanguageWordMeaning
1EnglishtreasureA collection of valuable things; accumulated...
2Middle EnglishtresourSomething or someone of great value
3Old Frenchtresortreasure
4Latinthēsaurustreasure, hoard
5Ancient Greekθησαυρόςtreasure; vault, repository, chest
6Ancient GreekτίθημιI put, place, set; I make, cause to be; I make
7Proto-Indo-Europeandʰeh₁-to do, put, place
Every word from Proto-Indo-European h₂él-Every word from Proto-Indo-European h₂eltósEvery word from Proto-Germanic aldaz