half
adverb
hɑːf 
hæf 
1 to the extent of halfThe glass was half full.2 partlyThe chicken was only half cooked.half-closed eyesI'm half inclined to agree.Idioms
half as many, much, etc. again
(British English) (US half again as much) an increase of 50% of the existing number or amountSpending on health is half as much again as it was in 2009.not half
(British English, informal) used to emphasize a statement or an opinionIt wasn't half good (= it was very good).‘Was she annoyed?’ ‘Not half!’ (= she was extremely annoyed).not half as
|not half such a
not nearly
He is not half such a fool as they think.