Word Origin & History
melt
O.E. meltan "become liquid" (class III strong verb; past tense mealt, pp. molten), from P.Gmc. *meltanan; fused with O.E. gemæltan (Anglian), gemyltan (W.Saxon) "make liquid," from P.Gmc. *gamaltijanan (cf. O.N. melta "to digest"), both from PIE *meld- "softness" (cf. Gk. meldein "to melt," L. mollis "soft, mild"). Meltdown is from 1965 in reference to a nuclear reactor; metaphoric extension since early 1980s.