Synonyms of 'liquefy'
meltDictionary, dissolve, thawHeat the jam until it liquefies.
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If a substance dissolves in liquid or if you dissolve it, it becomes mixed with the liquid and disappears.
Heat gently until the sugar dissolves.
Thesaurus for liquefy from the Collins English Thesaurus
When a gas or solid substance liquefies or is liquefied , it changes its form and becomes liquid.