Same word as Fag out:

abate,attenuate,clear,decline, deliquesce,deteriorate, die away, die on vine,dim,diminish,disappear,disperse,dissolve,droop,ebb, etiolate, evanesce, evanish, evaporate,fag out,fail,fall,flag,fold, hush,languish,lessen,melt, melt away,moderate,perish, pete