resolve has 14 distinct synonyms spread across 8 of its 9 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
make clearly visible
“can this image be resolved?”
cause to go into a solution
“The recipe says that we should dissolve a cup of sugar in two cups of water”
the trait of being resolute
“his resoluteness carried him through the battle”
a formal expression by a meeting; agreed to by a vote
Synonyms, antonyms and the broader and narrower relations for resolve come from Princeton University’s WordNet. Full sources and licences.