Đồng nghĩa của hard to pin down

slippery cunning evasive sneaky tricky crafty devious untrustworthy false shifty dishonest duplicitous sly treacherous unpredictable unreliable artful foxy shady slick two-faced wily contriving deceitful deceptive guileful scheming dodgy elusive fugitive furtive iffy Janus-faced sneaking snide stealthy shonky cagey changeable fly-by-night inconstant insecure mutable uncertain unsafe unstable unsteady variable underhand unscrupulous crooked underhanded double-dealing dishonourable dubious dishonorable corrupt designing subtle unprincipled sharp fraudulent bent secret disingenuous insincere clandestine roguish questionable indirect undependable surreptitious precarious lying secretive shaky slim insidious unethical rogue covert Machiavellian dangerous disreputable shrewd dissembling conniving risky deceiving mendacious undercover traitorous conspiratorial fast calculating wobbly suspicious hush-hush perfidious hazardous two-timing fishy suspect untruthful perilous underground oblique private hidden backstairs unfaithful misleading stealth not to be trusted privy dicey sneak chancy hairy rocky murky hugger-mugger double-faced behind-the-scenes hole-and-corner rickety sub-rosa parlous cheating hypocritical astute faithless under the table delusive seedy under wraps fly counterfeit scandalous sketchy clever skulking slinking inglorious cloaked irresponsible knavish unsettled unsure defrauding black doubtful concealed tottering truthless hollow-hearted false-hearted plotting unhealthy fair-weather not dependable touch and go not to be depended on smart smooth beguiling cagy cute canny pretended unfair collusive untrue carny swindling bluffing unsound delicate Punic unjust slimy rascally wobbling enigmatic disloyal trustless immoral problematic astucious fake teetering phoney menacing phony double-crossing unsecured hoodwinking tottery cautious illegal unctuous movable lubricious of dubious character potentially illegal hanging by a thread moving on the QT ticklish mobile wiggly on thin ice alarming on the quiet not fixed not secure colluding shadowy manipulative dark impish arch intriguing captious ingenious illusory mischievous mysterious caballing conspiring deviant trick snidey dirty-dealing exploitative bogus sham unprofessional cowboy unhonest not trustworthy dirty sideways sidelong under-the-table quiet catlike catty silent feline noiseless amoral unlawful criminal irregular deep wry greasy intelligent witted streetwise keen delusory not to be relied upon salty ornery hostile illicit snaky plausible rascal off mock spurious bum seeming serpentine catchy imposturous cloak and dagger disguised creepy behind someone's back circumspect masked malfeasant hole and corner shrouded recreant backbiting villainous sinister veiled hollow jeopardous untrusty fickle fink quivering wabbling wabbly gnarly ominous dissimulating back-alley cloak-and-dagger low-down not stable difficult unbalanced shaking trembly trembling quaking shuddery tremulous quavery shuddering overdone exaggerated feigned cynical artificial atremble aquiver jive put-on mealymouthed backhanded phony-baloney Pecksniffian not candid lacking sincerity lip not frank phoney-baloney double mealy left-handed threatening unfastened doddery pretend pretentious pseud ambidextrous difficult to track down difficult to find always on the move difficult to catch cowardly yellow bockety vulnerable with tongue in cheek giddy dizzy weak exposed defenceless life-threatening high-risk serious harmful toxic grievous jeopardizing threatened injurious venturesome destructive malignant grave unprotected touch-and-go explosive erratic fearsome on a limb touchy defenseless open to attack jeopardising fallacious equivocating ambiguous prevaricating equivocal built on sand on a slippery slope hanging in the balance out on a limb vague indeterminate cryptic unclear shuffling indefinite inexplicit inexact imprecise indistinct roundabout perplexing obscure gnomic puzzling circumlocutory sophistical circuitous intangible periphrastic casuistic Delphic casuistical stonewalling elusory noncommittal non-committal

hard to please hard-to-please hardtops hard-to-reach hard to read hard to resist hardtop hard to make out hard to left hard to hear hard to handle hard to get to