Antonyms of adj zestful

1 sense of zestful

Sense 1
zestful, yeasty, zesty, barmy -- (marked by spirited enjoyment)

INDIRECT (VIA spirited) -> spiritless -- (lacking ardor or vigor or energy; "a spiritless reply to criticism")

Similarity of adj zestful

1 sense of zestful

Sense 1
zestful, yeasty, zesty, barmy -- (marked by spirited enjoyment)
       => spirited (vs. spiritless) -- (displaying animation, vigor, or liveliness)