deliquiate
To melt and become liquid by absorbing water from the air; to deliquesce.
intransitive
Its strong taste, its tendency to deliquiate, and indeed all its properties, lead us to think, that it would act powerfully on the animal œconomy […]
To cause to melt.
transitive
Where it comes from
First attested in 1668; either from deliquium + -ate (verb-forming suffix) or an alteration of deliquate.
Adapted from the Wiktionary entry deliquiate (CC BY-SA 4.0).