畅所欲言

lit. fluently saying all one wants (idiom); to preach freely on one's favorite topic / to hold forth to one's heart's content

free / unimpeded / smooth / at ease / free from worry / fluent

actually / place / classifier for houses, small buildings, institutions etc / that which / particle introducing a relative clause or passive / CL:個|个[ge4]

desire / appetite / passion / lust / greed

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

words / speech / to say / to talk