The story
- Proto-Indo-European · derived from*ḱers-“to run”
- English todayexcursus
Learned borrowing from Latin excursus (“excursion; raid, sally, sortie”), a verbal noun from excurrō (“to run out; to sally forth”) + -sus (suffix forming verbal nouns), with the verb derived from ex- (prefix meaning ‘away; out’) + currō (“to run; to move, proceed, travel; etc.”) (ultimately from Proto-Indo-European *ḱers- (“to run”)). Doublet of excurse.
Words from the same roots
Etymology from Wiktionary, CC BY-SA 4.0.