I. adverb Date: 1611 in a plump way , II. adverb Etymology: 3plump Date: 1786 in a wholehearted manner and without hesitation or circumlocution ; forthrightly
PLUMPLY
Meaning of PLUMPLY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012