The Great Vowel Shift

Examples:

ME /i/   >  EMnE  /ai/    bite, five, eye                                        /u/  >  /au/  down, loud, house

    /e/    >     /i/      feet, meed, heethe (heath)                 /o/  >  /u/   roote

    /ε/    >     /e/     cleane  (later /i/)                  /⊃/  >  /o/   gote, bote (boat)

                                /a/    >        /ε/   name, came (later /e/)