R. Yonah's Four Kitot 19: Unrefined Speech and Complaining Too Much

Rabbenu Yonah's Four Kitot 19: Unrefined Speech and Complaining Too Much, by Rav Gidon Rothstein The last two categories of negative speech, nivul peh and nirgan, speaking in unrefined and low-class ways, and complaining too much about life, not seeing the good in it.