Where does “center-left” come from?

center-left (English) comes from English left, from Middle English left, from Middle English laft, from Old English læfd, from Old English lǣfan, from Frankish laibijan, from Proto-Germanic laibijaną, from Proto-Germanic lībaną — to leave, let; to want, desire; to let; leave...

Ancestry of “center-left”, step by step

center-left traces back through two separate lines of ancestry.

via English left

StepLanguageWordMeaning
1EnglishleftThe opposite of right; toward the west when one...
2Middle Englishleft
3Middle Englishlaftpast participle of leave
4Old Englishlæfd
5Old Englishlǣfanto leave
6Frankishlaibijanto leave; to leave behind
7Proto-Germaniclaibijanąto leave behind, to leave remaining
8Proto-Germaniclībanąto remain, to be left
9Proto-Indo-Europeanleyp-to stick; fat or sticky substance
10Proto-Indo-Europeanlēy-to leave, let; to want, desire; to let; leave...

via English Center

StepLanguageWordMeaning
1EnglishCenterThe point in the interior of a circle that is equidistant from all points on the circumference
2Middle Englishcenter
3Middle Frenchcentre
4Latincentrumcenter
5Ancient GreekκέντρονSomething with a sharp point: point, spike, spur;...
6Proto-Hellenic*kéntron
7Proto-Indo-European*ḱéntrompointed tool
Every word from Proto-Indo-European lēy-