Where does “spendthriftness” come from?

spendthriftness (English) comes from English spendthrift, from English spend, from Middle English spenden, from Old English spendan, from Proto-West Germanic spendōn, from Latin expendō, from Latin pendō, from Proto-Italic pendō — to stretch.

spendthriftness (English): The condition of being a spendthrift; profligacy

Definitions

  1. The condition of being a spendthrift; profligacy

Ancestry of “spendthriftness”, step by step

spendthriftness traces back through two separate lines of ancestry.

via English spendthrift

StepLanguageWordMeaning
1EnglishspendthriftImprovident, profligate, or wasteful; Extravagant...
2EnglishspendTo pay out; To bestow; to employ; often with "on"...
3Middle Englishspendento spend
4Old Englishspendanto spend
5Proto-West Germanicspendōnto spend
6Latinexpendōto weigh
7Latinpendōto weigh, weigh out
8Proto-Italicpendōhang, put in a hanging position
9Proto-Indo-European(s)péndeti
10Proto-Indo-European(s)pend-to stretch

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European (s)pend-Every word from Proto-Indo-European (s)péndetiEvery word from Proto-Italic pendō
spendthriftness — Etymology, Origin & Word History | Etymology Explorer