half
noun
one of two equal parts of a divisible whole
“half a loaf”
“half an hour”
Synonymsone-halfone of two divisions into which some games or performances are divided: the two divisions are separated by an interval
adjective
consisting of one of two equivalent parts in value or quantity
“a half chicken”
“lasted a half hour”
partial
“gave me a half smile”
“he did only a half job”
(of siblings) related through one parent only
“a half brother”
“half sister”
Oppositeswhole
adverb
partially or to the extent of a half
“he was half hidden by the bushes”
Source: WordNet 3.1, Princeton University