Where does “impensurus” come from?

impensurus (Latin) comes from Latin impendo, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Definitions

Ancestry of “impensurus”, step by step

StepLanguageWordMeaning
1LatinimpendoI spend or expend; I devote to
2Latinīn-un-, non-, not
3Latinînin, at, on, upon, from (space)
4Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
5Proto-Italicenin
6Proto-Indo-Europeanh₁énin
Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Proto-Italic en →