Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class V. Words Releasing to the Voluntary Powers
Division (I) Individual Volition
Section I. Volition in General
1. Acts of Volition

605. Irresolution.

   NOUN:IRRESOLUTION, infirmity of purpose, indecision, indetermination, undetermination [rare], instability; loss of will power, abulia, abulomania; unsettlement; uncertainty [See Uncertainty]; demur, suspense; hesitating &c. v., hesitation, hesitancy; wabble or wobble; revocability, vacillation; changeableness [See Changeableness]; fluctuation; alternation (oscillation) [See Oscillation]; caprice [See Caprice]; lukewarmness, Laodiceanism.
  FICKLENESS, levity, légèreté [F.]; pliancy (softness) [See Softness]; weakness; timidity [See Fear]; cowardice [See Cowardice]; half measures.
  WAVERER, shilly-shally, ass between two bundles of hay; shuttlecock, butterfly, feather, piece of thistledown; house built on sand; doughface [U. S.]; turncoat, opportunist, Vicar of Bray, Dite Deuchars; Laodicean; timeserver [See Tergiversation].
   VERB:BE IRRESOLUTE &c. adj.; hang -, keep- in suspense; leave ad referendum; think twice about, pause; dawdle (inactivity) [See Inactivity]; remain neuter; dilly-dally, hesitate, boggle, hover, dacker or daiker [dial. Eng. & Scot.], wabble or wobble [colloq.], shilly-shally, hum and haw, demur, not know one’s own mind; debate, balance; dally with, coquet with; will and will not, chasser-balancer [F.]; go halfway, compromise, make a compromise; be thrown off one’s balance, stagger like a drunken man; be afraid [See Fear]; let “I dare not” wait upon “I would” [Macbeth]; falter, waver.
  VACILLATE [See Changeableness]; change [See Change]; retract [See Tergiversation]; fluctuate; pendulate; alternate (oscillate) [See Oscillation]; keep off and on, play fast and loose; blow hot and cold (caprice) [See Caprice]; turn one’s coat.
  SHUFFLE, palter, blink, shirk, trim.
   ADJECTIVE:IRRESOLUTE, infirm of purpose, palsied, drifting, double-minded, half-hearted; undecided, unresolved, undetermined; shilly-shally, wabbly or wobbly; fidgety, tremulous; hesitating &c. v.; off one’s balance; abulic; at a loss (uncertain) [See Uncertainty].
  VACILLATING &c. v.; unsteady (changeable) [See Changeableness]; unsteadfast, fickle, unreliable, irresponsible, unstable, unstable as water, without ballast; capricious [See Caprice]; volatile, frothy; light, lightsome, lightminded; giddy; fast and loose.
  WEAK, feeble-minded, frail; timid [See Fear]; cowardly [See Cowardice]; dough-faced [U. S.]; facile; pliant (soft) [See Softness]; unable to say “no,” easy-going.
  REVOCABLE, reversible.
   ADVERB:IRRESOLUTELY &c. adj.; irresolvedly; in faltering accents; off and on; on the sands; from pillar to post; seesaw [See Oscillation].
  1. The brave man chooses while the coward stands aside.—Lowell
  2. To have twa minds is as confusing as twins.—Barrie
  3. How happy could I be with either!—Gay