I. adverb Date: 14th century in an ~ fashion, II. adjective Date: 14th century not mannerly ; discourteous , unmannerliness noun
UNMANNERLY
Meaning of UNMANNERLY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012