呕

干呕

gān ǒu

to retch

作呕

zuò ǒu

to feel sick

呕出物

ǒu chū wù

vomitus

呕吐

ǒu tù

to vomit

呕吐物

ǒu tù wù

vomit

呕心沥血

ǒu xīn lì xuè

lit. to spit out one's heart and spill blood (idiom)

呕气

òu qì

variant of 慪氣|怄气[ou4 qi4]

嗳气呕逆

ǎi qì ǒu nì

belching and retching counterflow (medical term)