Definition of ticklish :
1. Difficult; nice; critical; as, a ticklish business.
2. Sensible to slight touches; easily tickled; as, the sole of the foot is very ticklish; the hardened palm of the hand is not ticklish.
3. Standing so as to be liable to totter and fall at the slightest touch; unfixed; easily affected; unstable.
precarious, irritable, thin-skinned, unstable, hypersensitive, continue, huffy, changeable, inconsistent, mercurial, freakish, unsteady, capricious, touch-and-go, change, erratic, frail, fragile, prickly, uncertain, unpredictable, awkward, inconstant, sensitive, fantastic, delicate, variable, volatile, whimsical, touchy, fantastical, easy, temperamental, fickle, finespun, soft, intricate, feisty
difficult (part of speech: adjective)
formidable, stressful, cumbersome, contrary, severe, arduous, knotty, demanding, harsh, oppressive, uphill, thorny, tricky, finicky, hard, fussy, troublesome, difficult, wearing, tough, strenuous, wearying, complicated, complex, cantankerous, tight, rugged, burdensome, wearisome, grinding, adverse, toilsome, laborious, rough, onerous, trying, bothersome
- Owners have become ticklish of late, and do not care for strangers bringing an odd horse or two into their camp; however, I can make it all right with them, and Mr. Tuxford may send Lucky Boy here as soon as he likes. - "The Second String", Nat Gould.
- In certain directions and degrees of wind this was rather a ticklish task; but he had taken the precaution of putting up here and there a bit of rope. - "Donal Grant", George MacDonald.
- It is indeed a very ticklish theme to discuss. - "Moral", Ludwig Thoma.