Antonyms of adj peppy

1 sense of peppy

Sense 1
bouncing, bouncy, peppy, spirited, zippy -- (marked by lively action; "a bouncing gait"; "bouncy tunes"; "the peppy and interesting talk"; "a spirited dance")

INDIRECT (VIA lively) -> dull -- (lacking in liveliness or animation; "he was so dull at parties"; "a dull political campaign"; "a large dull impassive man"; "dull days with nothing to do"; "how dull and dreary the world is"; "fell back into one of her dull moods")

Similarity of adj peppy

1 sense of peppy

Sense 1
bouncing, bouncy, peppy, spirited, zippy -- (marked by lively action; "a bouncing gait"; "bouncy tunes"; "the peppy and interesting talk"; "a spirited dance")
       => lively (vs. dull) -- (full of life and energy; "a lively discussion"; "lively and attractive parents"; "a lively party")