一言难尽

hard to explain in a few words (idiom); complicated and not easy to express succinctly

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

one sentence / brief remark

words / speech / to say / to talk

difficult (to...) / problem / difficulty / difficult / not good

disaster / distress / to scold

to the greatest extent / (when used before a noun of location) furthest or extreme / to be within the limits of / to give priority to

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