Where does “downposit” come from?

downposit (English) comes from English deposit, from Latin dēpositus, from Latin dēpōnō, from Latin dē-, from Latin dē, from Latin post, from Latin poste, from Proto-Italic posti — afterwards, post; by, at.

Ancestry of “downposit”, step by step

downposit traces back through two separate lines of ancestry.

via English deposit

StepLanguageWordMeaning
1EnglishdepositSediment or rock that is not native to its...
2Latindēpositusdeposited
3Latindēpōnōto lay, set, put or place aside or away; deposit
4Latindē-of; from
5Latinof; concerning; about
6Latinpostbehind; after, since, besides, except; behind,...
7Latinposteablative singular of postis
8Proto-Italicpostibehind, after
9Proto-Indo-Europeanpóstiafter
10Proto-Indo-Europeanpósafterwards, post; by, at

via English down payment

StepLanguageWordMeaning
1Englishdown paymentA payment representing a fraction of the price of something being purchased, made to secure the right to continue making payments towards that purchase
Every word from Proto-Indo-European pósEvery word from Latin dē-Every word from Proto-Indo-European pósti