vanish /ˈvaniSH, ˈvænɪʃ 
/ ▸ verb [no object] 1 disappear suddenly and completely: Mary vanished without a trace.
▪ gradually cease to exist: the days of the extended family are vanishing.
2 Mathematics become zero. – ORIGIN Middle English : shortening of Old French e(s)vaniss-, lengthened stem of e(s)vanir, from Latin evanescere ‘die away’.
EnglishOxford New American Dictionary
