for*tu"i*tous*ness
Webster's Dictionary (GCIDE)
Fortuitous \For*tu"i*tous\, a. [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. [1913 Webster]
It was from causes seemingly fortuitous . . . that all the mighty effects of the Reformation flowed.— Robertson.[1913 Webster]
So as to throw a glancing and fortuitous light upon the whole.— Hazlitt.[1913 Webster]
2.(LAw) 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. [1913 Webster]