fortuitous

adj. 偶然的，意外的

forsaken, forseeable, forswear, forsythia, fort, forte, forth, forthcoming, forthright, forthwith, fortieth, fortification, fortified wine, fortify, fortissimo, fortitude, fortnight, fortnightly, FORTRAN (also Fortran), fortress, fortuity, fortunate, fortunately, fortune, fortune cookie, fortune-hunter, fortune-teller, forty, forty-five (also 45), forum, forward, forward-looking, forwarding address, forwarding agent, forwardness, forwent, fossil, fossil fuel, fossil man, fossilization, fossilisation,