English is a simple language, otherwise it would not have become the "Pidgin" of the world. Try German, Polish or Chinese for complexity.
If gh is pronounced P in Hiccough...
If ough is pronounced O in Dough...
If phth is pronounced T in Phthisis...
If eigh is pronounced A in Neighbour...
If tte is pronounced T in Gazette...
If eau is pronounced O in Plateau...
...then it should be possible to spell potato as ghoughphtheightteeau.
(Origin unknown)