费口舌

[PollyWaffle]

when is it appropriate to use this? is it a situation where you have caused trouble & have to explain yourself, or are other situations applicable also?

polly

[Quest]

费口舌 -- waste energy talking/explaining

[xiaomawang]

Use it when "whatever you talk or how you explain, the result won't be changed."

[PollyWaffle]

thank you

[gene]

you can also use it when it have some difficult to explain.

for example:

说清这件事很费口舌。

费了一番口舌才把他劝住。