DELIQUESCE
deliquesce
(verb) melt or become liquid by absorbing moisture from the air; “this type of salt deliquesces easily”
deliquesce
(verb) melt away in the process of decay; “The fungi eventually deliquesced”
Source: WordNet® 3.1
Verb
deliquesce (third-person singular simple present deliquesces, present participle deliquescing, simple past and past participle deliquesced)
(intransitive) To melt and disappear.
(intransitive, chemistry) To become liquid by absorbing water from the atmosphere.
Source: Wiktionary
Del`i*quesce", v. i. [imp. & p. p. Deliquesced; p. pr. & vb. n.
Deliquescing.] Etym: [L. deliquescere to melt, dissolve; de- +
liquescere to become fluid, melt, fr. liquere to be fluid. See
Liquid.] (Chem.)
Definition: To dissolve gradually and become liquid by attracting and
absorbing moisture from the air, as certain salts, acids, and
alkalies.
In very moist air crystals of strontites deliquesce. Black.
Source: Webster’s Unabridged Dictionary 1913 Edition