Some words don't have any antonyms. The closest word I know that may be one antonym for visualize is auditorize.
Ignore and disregard are two antonyms of heed.
inaudibly, silently
what is the antonym of lavishly
Conclude and stop are antonyms for the word cease.
The verb "cleave" is the only English word with two synonyms which are antonyms of each other: adhere and separate.
Two antonyms (opposites) of "Savagely" might be "Gently" and "Tenderly".
Fast and busy are antonyms for lazy.
Two antonyms for the noun play are: boredom and rest.Two antonyms for the verb play are: work and labor.Two antonyms for the verb play are: watch and listen.Two antonyms for the verb play are: sincerity and candor.
Shame or disgrace would both be antonyms of dignity.
The two antonyms for the word "old" are "new" and "young."
Ignore and disregard are two antonyms of heed.
Boredom, and calmness
destroy;disensemble
acceptanceapprovalratificationsanction
Grin, smile
communicative, talkative
inaudibly, silently