Origin: Latin suffix -ous
Fortuitous has 3 different meanings across 1 category:
having no cause or apparent cause
"a causeless miracle"
"fortuitous encounters--strange accidents of fortune"
"we cannot regard artistic invention as...uncaused and unrelated to the times"
occurring by happy chance
"profits were enhanced by a fortuitous drop in the cost of raw materials"
Happening by chance; coincidental, accidental.
The word comes from the Latin fortuītus, meaning "happening by chance." It originally described events that occurred without human planning or design.