The following changes are mutations:—
a .. ę:—mann, pl. męnn; wand (wound prt.), węndan (to turn).
ea (= a) .. ie (= ę):—eald (old), ieldra (older); feallan (fall), fielþ (falls).
ā .. ǣ:—blāwan (to blow), blǣwþ (bloweth); hāl (sound), hǣlan (heal).
u .. y:—burg (city), pl. byriġ; trum (strong), trymman (to strengthen).
o .. y:—gold, gylden (golden); coss (a kiss), cyssan (to kiss).
e .. i:—beran (to bear), bireþ (beareth); cweþan (speak), cwide (speech).
eo (= e) .. ie (= i):—heord (herd), hierde (shepherd); ċeorfan (cut), ċierfþ (cuts).
u .. o:—curon (they chose), ġe·coren (chosen).
ū .. ȳ:—cūþ (known), cȳþan (to make known); fūl (foul), ā·fȳlan (defile).