late 14c., "having good fortune; bringing good fortune," from Latin fortunatus "prospered, prosperous; lucky, happy," past participle of fortunare "to make prosperous," from fortuna (see fortune). Fortunate Islands "mythical abode of the blessed dead, in the Western Ocean" (early 15c.; late 14c. as Ilondes of fortune) translates Latin Fortunatae Insulae.
a fortunate choice
other, less fortunate, children died
fortunate son
she made a fortunate decision to go to medical school
fortnight
Fortran
fortress
fortuitous
fortuity
fortunate
fortunately
fortune
fortune cookie
fortune-teller
forty