flighty 
/ˈflaɪti/ adjective
flight·i·er; flight·i·est /ˈflaɪti/ adjective [also more flighty; most flighty] 1 : not serious or dependable : likely to forget things or to change opinions, plans, etc., without reason
▪ an actress who specializes in playing silly, flighty women 2 : easily excited or frightened
▪ flighty [=skittish] racehorses ▪ flighty investors
▪ an actress who specializes in playing silly, flighty women
▪ flighty [=skittish] racehorses ▪ flighty investors
— flight·i·ness /ˈflaɪtinəs/ noun [noncount]
/ˈflaɪtinəs/ noun [noncount]
