adverb
1.
Synonyms: evenly 3, flatly, smooth, uniformly
Contrasted words: unevenly, ununiformly
Antonyms: roughly
2.
Synonyms: easily 1, effortlessly, facilely, freely, lightly, readily, well
Antonyms: unsmoothly
SMOOTHLY
Meaning of SMOOTHLY in English
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003