THESAURUS
Hesitate
alternate, back down, balance, balk, be dilatory, blench, boggle, call a recess, debate, delay, deliberate, demur, dither, equivocate, falter, fear, fight shy of, filibuster, flinch, fluctuate, fumble, gain time, halt, hang, hang back, hang fire, hang in doubt, hang off, have qualms, haver, haw, hem, hem and haw, hold back, hold off, hover, hum, hum and haw, jib, let up, make bones about, make time, mammer, pause, play for time, ponder, procrastinate, pull back, quail, recess, recoil, rest, retreat, scruple, shilly-shally, shrink, shrink from, shy, shy at, splutter, sputter, stall, stall for time, stall off, stammer, stick at, stickle, stooge around, stop to consider, straddle the fence, strain, strain at, stumble, stutter, take a recess, talk against time, temporize, tergiversate, think twice, think twice about, vacillate, wait, waver, wince, withdraw, yield
ROGET THESAURUS
Hesitate
Stammering
VB
stammer, stutter, hesitate, falter, hammer, balbutiate, balbucinate, haw, hum and haw, be unable to put two words together, mumble, mutter, maud, mauder, whisper, mince, lisp, jabber, gibber, sputter, splutter, muffle, mump, drawl, mouth, croak, speak thick, speak through the nose, snuffle, clip one's words, murder the language, murder the King's English, murder the Queen's English, mispronounce, missay.
Unwillingness
VB
be unwilling, nill, dislike, grudge, begrudge, not be able to find it in one's heart to, not have the stomach to, demur, stick at, scruple, stickle, hang fire, run rusty, recoil, shrink, swerve, hesitate, avoid, oppose, dissent, refuse.
Irresolution
VB
be irresolute, hang in suspense, keep in suspense, leave "ad referendum", think twice about, pause, dawdle, remain neuter, dillydally, hesitate, boggle, hover, dacker, hum and haw, demur, not know one's own mind, debate, balance, dally with, coquet with, will and will not, chaser-balancer, go halfway, compromise, make a compromise, be thrown off one's balance, stagger like a drunken man, be afraid, let 'I dare not' wait upon 'I would', falter, waver vacillate, change, retract, fluctuate, pendulate, alternate, keep off and on, play fast and loose, blow hot and cold, shuffle, palter, blink, trim.
Discontinuity
VB
be discontinuous, alternate, intermit, sputter, stop and start, hesitate, discontinue, pause, interrupt, intervene, break, break in upon, break off, interpose, break the thread, snap the thread, disconnect, dissever.
Fear
VB
fear, stand in awe of, be afraid, have qualms, apprehend, sit upon thorns, eye askance, distrust, hesitate, falter, funk, cower, crouch, skulk, let 'I dare not' wait upon 'I would' take fright, take alarm, start, wince, flinch, shy, shrink, fly, tremble, shake, shiver, shiver in one's shoes, shudder, flutter, shake like an aspen leaf, tremble like an aspen leaf, tremble all over, quake, quaver, quiver, quail, grow pale, turn pale, blench, stand aghast, not dare to say one's soul is one's own, inspire fear, excite fear, inspire awe, excite awe, raise apprehensions, be in a daze, bulldoze, faze, feeze, give an alarm, raise an alarm, sound an alarm, alarm, startle, scare, cry 'wolf', disquiet, dismay, fright, frighten, terrify, astound, fright from one's propriety, fright out of one's senses, fright out of one's wits, fright out of one's seven senses, awe, strike all of a heap, strike an awe into, strike terror, harrow up the soul, appall, unman, petrify, horrify, pile on the agony, make one's flesh creep, make one's hair stand on end, make one's blood run cold, make one's teeth chatter, take away one's breath, stop one's breath, make one tremble, haunt, prey on the mind, weigh on the mind, put in fear, put in bodily fear, terrorize, intimidate, cow, daunt, overawe, abash, deter, discourage, browbeat, bully, threaten.
Uncertainty
VB
be uncertain, wonder whether, lose the clue, lose the clew, scent, miss one's way, not know what to make of, not know which way to turn, not know whether one stands on one s head or one's, float in a sea of doubt, hesitate, flounder, lose oneself, lose one's head, muddle one's brains, render uncertain, put out, pose, puzzle, perplex, embarrass, confuse, confound, bewilder, bother, molder, addle the wits, throw off the scent, ambiguas in vulgus spargere voces, keep in suspense, doubt, hang in the balance, tremble in the balance, depend.
Doubt
VB
disbelieve, discredit, not believe, misbelieve, refuse to admit, refuse to believe, doubt, be doubtful, doubt the truth of, be skeptical as to, diffide, distrust, mistrust, suspect, smoke, scent, smell a rat, have doubts, harbor doubts, entertain doubts, suspicions, have one's doubts, demure, stick at, pause, hesitate, scruple, stop to consider, waver, hang in suspense, hang in doubt, throw doubt upon, raise a question, bring in, call in question, question, challenge, dispute, deny, cavil, cause a doubt, raise a doubt, start a doubt, suggest a doubt, awake a doubt, make suspicion, ergotize, startle, stagger, shake one's faith, shake one's belief, stagger one's faith, stagger one's belief.