What is the same meaning for Complain lengthily?

Here are some phrases that convey the same meaning as "complain lengthily":

Formal:

* Lament at length

* Expostulate at length

* Wail extensively

* Dwell on grievances

* Eloquently enumerate one's woes

* Prolong one's complaints

Informal:

* Go on and on

* Whine endlessly

* Moan and groan

* Have a good old grumble

* Bemoan endlessly

* Make a big fuss

* Rattle on and on

The best choice will depend on the context and the desired tone.