bāi kāi róu suì
lit. to pull apart and knead to a pulp
fig. to analyze minutely from every angle; to chew sth over
掰
bāi
to break off or break open sth with one's hands
开
kāi
to open (transitive or intransitive)
揉
róu
to knead
碎
suì
(transitive or intransitive) to break into pieces; to shatter; to crumble
