Senses
冰冻三尺，非一日之寒/ 冰凍三尺，非一日之寒 Rome was not built in a day
Literal meaning: ice three feet thick is not formed by one day of cold; used to express that a current situation (often a problematic one) is the result of long-term accumulation and will not be easily resolved.
References
No references for this word.