FORTUITOUS
fortuitous
(adjective) occurring by happy chance; “profits were enhanced by a fortuitous drop in the cost of raw materials”
causeless, fortuitous, uncaused
(adjective) 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”
Source: WordNet® 3.1
Etymology
Adjective
fortuitous (comparative more fortuitous, superlative most fortuitous)
Happening by chance; coincidental, accidental.
Happening by a lucky chance; lucky or fortunate.
(legal) Happening independently of human will.
Synonyms
• (happening by chance): by accident, causeless, incidental; see also accidental
• (happening by lucky chance): happy, providential; see also lucky
Source: Wiktionary
For*tu"i*tous, a. Etym: [L. fortuitus; akin to forte, adv., by
chance, prop. abl. of fors, fortis, chance. See Fortune.]
1. Happening by chance; coming or occuring unexpectedly, or without
any known cause; chance; as, the fortuitous concourse of atoms.
It was from causes seemingly fortuitous . . . that all the mighty
effects of the Reformation flowed. Robertson.
So as to throw a glancing and fortuitous light upon the whole.
Hazlitt.
2. (LAw)
Definition: Happening independently of human will or means of foresight;
resulting from unavoidable physical causes. Abbott.
Syn.
– Accidental; casual; contingent; incidental. See Accidental.
– For*tu"i*tous*ly, adv.
– For*tu"i*tous*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition