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