Of course etymology

English

English word of course comes from Latin -tus, Proto-Indo-European *kers-, Proto-Indo-European *sker-, and later Proto-Italic *korzō (To run.)

Detailed word origin of of course

Dictionary entry Language Definition
-tus Latin (lat) Forms collective/abstract nouns from adjectives. Forms action nouns from verbs. Forms adjectives having the sense provided with.. Forms the past participle of verbs.
*kers- Proto-Indo-European (ine)
*sker- Proto-Indo-European (ine) cut, to turn, bend, to bend, turn, shear, to twist, bend, dung, manure
currendus Latin (lat)
*ḱers- Proto-Indo-European (ine) to run
*korzō Proto-Italic (itc-pro) To run.
cursus Latin (lat) (figuratively) Course, progress, direction, development, succession, passage; career.. Course, way, passage, journey; tendency.. Journey, march, voyage, passage.. The act of running; race.
cours Old French (fro) Route; course; way.
course English (en) (especially in, _, medicine) A treatment plan.. (golf) A golf course.. (in the plural, courses, obsolete, euphemistic) Menses.. (masonry) A row of bricks or blocks.. (music) A pair of strings played together in some musical instruments, like the vihuela.. (music) A string on a lute.. (nautical) The direction of movement of a vessel at any given moment.. (nautical) The lowest square sail in a [...]
of course English (en) (idiomatic) Acknowledges the validity of the associated phrase.. (idiomatic) Asserts that the associated phrase should not be argued, particularly if it is obvious or there is no choice in the matter.. (idiomatic) Indicates enthusiastic agreement.. Used other than with a figurative or idiomatic meaning: see of,‎.

Words with the same origin as of course