掰开揉碎

bāi kāi róu suì

lit. to pull apart and knead to a pulp

fig. to analyze minutely from every angle; to chew sth over

bāi

to break off or break open sth with one's hands

kāi

to open (transitive or intransitive)

róu

to knead

suì

(transitive or intransitive) to break into pieces; to shatter; to crumble