Where does “longest” come from?

Longest comes from English long, from Middle English longen, from Old English lang, from Proto-Indo-European dl̥h₁gʰós, meaning extended in space or duration.

longest (English): superlative form of long: most long;...

Definitions

  1. superlative form of long: most long;...

Ancestry of “longest”, step by step

StepLanguageWordMeaning
1EnglishlongHaving much distance from one terminating point...
2EnglishlongitudeAngular distance measured west or east of the...
3Old Frenchlongitude
4Latinlongitūdōlength, longitude; longness
5Latinlongusfar, long; extended, prolonged; long; tedious,...
6Latinly; used to form adverbs from adjectives
7Latindis-asunder, apart, in two; reversal, removal;...
8Latincalceusshoe
9Latincalxlimestone; chalk; the finish line
10Ancient Greekχάλιξsmall stone, pebble; gravel, rubble
Every word from Ancient Greek χάλιξ