Where does “fulcral” come from?

fulcral (Portuguese) comes from English fulcrum, from Latin fulcrum, from Latin -crum, from Proto-Italic -klom, from Proto-Indo-European -tlom, from Proto-Indo-European -trom, from Proto-Indo-European -tḗr — Derives agent nouns from verbs, denoting someone...

fulcral (Portuguese): key, central

Definitions

  1. key, central

Ancestry of “fulcral”, step by step

fulcral traces back through two separate lines of ancestry.

via English fulcrum

StepLanguageWordMeaning
1EnglishfulcrumThe support about which a lever pivots; A crux or...
2Latinfulcrumbedpost; foot; couch
3Latin-crumused only when /l/ occurs earlier in the word
4Proto-Italic-klom
5Proto-Indo-European-tlomAlternative form of *-trom
6Proto-Indo-European-tromForms nouns denoting a tool or instrument
7Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

via Portuguese fulcro

StepLanguageWordMeaning
1Portuguesefulcrofulcrum
Every word from Proto-Indo-European -tḗrEvery word from Proto-Italic -klomEvery word from Proto-Indo-European -tlom