頭痛欲裂

to have a splitting headache (idiom)

head / hair style / the top / end / beginning or end / a stub / remnant / chief / boss / side / aspect / first / leading / classifier for pigs or livestock / CL:個|个[ge4]

suffix for nouns

to have a headache

ache / pain / sorrow / deeply / thoroughly

desire / appetite / passion / lust / greed

to wish for / to desire / variant of 慾|欲[yu4]

to split / to crack / to break open / to rend