fortun

From Latin fortūna (fortune, luck, chance, fate), related to fors (chance) and possibly fortis (strong). In Roman religion, Fortuna was the goddess of luck. English inherits both positive (fortunate, fortunately) and negative (unfortunate, misfortune) senses. Fortuitous (happening by chance) preserves the original neutral sense of randomness, though it's often mistakenly used as a synonym for "fortunate."