SOURCE
CHANGE
/u/
Spelling:
o, u, ou, ov, oo, ough, ovgh, v, eu, ew
[See "Great Vowel Shift" 
]
blood
root
High, back, tense, rounded vowel. Vowel of PDE boot.
SOUND
CHANGE
REFLEX
>>>>
,
PDE /U/ ,
PDE /'/
+ ME /h/
+ Great Vowel Shift