Varför stavar Freak och Break på samma sätt, men uttalas olika??

Inte det enda uttalsproblemet i engelskan...(kopierat från English Teachers Network)I take it you already know Of tough and bough and cough and dough? Others may stumble, but not you On hiccough, thorough, slough, and through. Well don't! And now you wish, perhaps, To learn of less familiar traps. Beware of heard, a dreadful word That looks like beard but sounds like bird. And dead: it's said like bed, not bead, For goodness sake don't call it deed! Watch out for meat and great and threat (They rhyme with suite and straight and debt). A moth is not a moth as in mother Nor both as in bother, nor broth as in brother, And here is not a match for there, Nor dear and fear, for bear and pear. And then there's dose and rose and lose-- Just look them up--and goose and choose And cork and work and card and ward And font and front and word and sword And do and go, then thwart and cart, Come, come! I've hardly made a start. A dreadful Language? Why man alive! I learned to talk it when I was five. And yet to write it, the more I tried, I hadn't learned it at fifty-five.