Antonyms of verb flatter

1 sense of flatter

Sense 1
flatter, blandish -- (praise somewhat dishonestly)
       Antonym of disparage (Sense 1)
      => disparage, belittle, pick at -- (express a negative opinion of; "She disparaged her student's efforts")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb flatter

1 sense of flatter

Sense 1
flatter, blandish -- (praise somewhat dishonestly)
       => praise -- (express approval of; "The parents praised their children for their academic performance")

Antonyms of adj flattering

1 sense of flattering

Sense 1
flattering (vs. unflattering) -- (showing or representing to advantage; "a flattering color")

unflattering (vs. flattering), uncomplimentary -- (showing or representing unfavorably; "an unflattering portrait"; "an uncomplimentary dress")

Similarity of adj flattering

1 sense of flattering

Sense 1
flattering (vs. unflattering) -- (showing or representing to advantage; "a flattering color")
       => adulatory -- (obsequiously complimentary; "they listened with flattering interest")
       => becoming -- (displaying or setting off to best advantage; "a becoming new shade of rose"; "a becoming portrait")
       => ingratiating, insinuating, ingratiatory -- (calculated to please or gain favor; "a smooth ingratiating manner")