Antonyms of adj certificatory

1 sense of certificatory

Sense 1
certificatory -- (serving to certify or endorse authoritatively)

INDIRECT (VIA supportive) -> unsupportive -- (not furnishing support or assistance)

Similarity of adj certificatory

1 sense of certificatory

Sense 1
certificatory -- (serving to certify or endorse authoritatively)
       => supportive (vs. unsupportive) -- (furnishing support or assistance; "a supportive family network"; "his family was supportive of his attempts to be a writer")