I. ˈwilēˈnilē, -li...li adverb (or adjective)
Etymology: alteration of will I nill I or will he nill he or will ye nill ye
: by compulsion : without regard to individual inclination : helplessly , inevitably
let the world drift willy-nilly towards disaster — C.P.Romulo
animals … forced together willy-nilly by the action of wind, tidal currents, or waves — W.C.Allee
willy-nilly, the situations in which we use words — I.A.Richards
II. adverb (or adjective)
: in a haphazard or spontaneous manner
boxes heaped willy-nilly