書不盡言

I have much more to say than can be written in this letter (conventional letter ending) (idiom)

abbr. for 書經|书经[Shu1 jing1]

book / letter / document / CL:本[ben3],冊|册[ce4],部[bu4] / to write

no; not so / (bound form) not; un-

not completely / endlessly

to use up / to exhaust / to end / to finish / to the utmost / exhausted / finished / to the limit (of sth) / all / entirely

saying everything / to speak out fully

words / speech / to say / to talk