See ticklish in Webster's New World Roget's A-Z Thesaurus II
adjective
Following no predictable pattern:
capricious, changeable, erratic, fantastic, fantastical, fickle, freakish, inconsistent, inconstant, mercurial, temperamental, uncertain, unpredictable, unstable, unsteady, variable, volatile, whimsical. See change, continueRequiring great tact or skill:
delicate, sensitive, touch-and-go, touchy, tricky. See easy
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