What is the origin of deliquesce?

Deliquesce, “to melt away; become liquid,” comes straight from Latin dēliquēscere “to become liquid, dissipate one’s energy,” a compound of the preposition and prefix , -, here indicating removal, and the verb liquēscere “to melt, decompose, putrefy.” Liquēscere is an inchoative verb (also called an inceptive verb), meaning that the verb indicates the beginning, the inception of an action. In Latin (and in Greek) the suffix –sc– (Latin) and –sk– (Greek) changes a verb of state, such as liquēre “to be liquid, be clear,” to an inceptive verb. Derivatives of liquēre include liquidus “clear, fluid” (English liquid) and liquor “fluidity, liquid character” (English liquor). Deliquesce entered English in the mid-18th century.