irresolute (part of speech: adjective)
insipid, undecided, shrinking, changeable, inconsistent, spineless, fly-by-night, shifty, infirm, shy, unresolved, irresponsible, unwilling, undependable, double-minded, tentative, irresolute, uncertain, dillydallying, weak, watery, unsure, yellow, shilly-shally, halfhearted, erratic, hesitant, vacillating
capricious (part of speech: adjective)
transient (part of speech: adjective)
mortal, transitory, shifting, passing, temporal, flickering, brief, restless, impermanent, cursory, rootless, evanescent, instantaneous, ephemeral, short-term, temporary, transient, fading, short-lived, mutable, momentary
motiveless (part of speech: adjective)
capricious, careless, reasonless, fleeting, fickle, haphazard, ambivalent, indecisive, irregular, systemless, whimsical, motiveless, fanciful, sporadic, nonsystematic, flighty, wandering, chancy, rambling, spastic, unmethodical, volatile, wayward, random, adrift, impulsive, arbitrary
- And here the dreams again came flitting by them, but they moved so quickly that Gerda could not see the high- born lords and ladies. - "Journeys Through Bookland V2", Charles H. Sylvester.
- Cook has left,- in the night,- what the Scotch call a " moonlight flitting." - "Dear Enemy", Jean Webster.
- " Sure I know Dan loves laddie better than his own life," said the good old man anxiously, as he watched Neb's ragged sail flitting off with the two young fishermen. - "Killykinick", Mary T. Waggaman.