Đồng nghĩa của hard to digest

stodgy boring dull tedious dreary turgid unimaginative uninteresting dry monotonous ponderous stuffy unexciting uninspired wearisome humdrum tiresome formal heavy-going ho-hum plodding arid colourless colorless derivative drab drudging dusty flat heavy jading jejune laboured leaden mind-numbing monochromatic numbing old pedantic pedestrian slow staid stale stupid tame tiring unoriginal weary wearying wooden banal deadly dull fuddy-duddy verbose banausic dim labored stilted weighty heavy going dull as ditchwater prosaic lifeless insipid vapid commonplace routine lacklustre lackluster uneventful bland run-of-the-mill uninspiring spiritless mundane trite unvaried ordinary bromidic characterless repetitious sterile unremarkable workaday ho hum blah samey common stiff unvarying quotidian tired hackneyed fatiguing laborious featureless dead vanilla repetitive unstimulating as dry as dust everyday dull as dishwater prosy barren nowhere soporific deadly dry as dust platitudinous conventional monochrome passionless nothing wishy-washy enervating exhausting dreich plain vanilla dullsville lacking variety draggy matter-of-fact mediocre uniform uncreative irksome usual unexceptional unrelieved weariful soulless mechanical unchanging inane soul-destroying lame awkward depressing nondescript yawnsome unenjoyable unentertaining hacky monotone clumsy nothing to write home about lacking excitement lacking interest no great shakes stereotyped big yawn unnatural forced mindless threadbare lusterless interminable plebeian zero well-worn feeble limp bloodless stock vacuous weak unadventurous derived uninventive empty sluggish anaemic bog-standard toneless innocuous ornery dragging lacking variation white-bread heavy-handed desolate corny downcast day-to-day unspirited anemic deadening dismal prolix pabulum treadmill run of the mill common or garden old hat not up to much a dime a dozen flavorless moth-eaten bomb bummer drag cloying drear artificial serious stolid solemn undistinctive neutral indistinct unlively unpassioned unmemorable undistinguished second-rate irritating annoying indifferent predictable unartistic depressed cardboard flavourless earthbound boresome vexatious overlong unromantic unanimated uninterested tepid normal typical customary regular worn-out quiet sleepy slack droning zestless non-stimulating mortal poky snooze square unimpressed unmoved yawn antiseptic stagnant wintery raw sorrowful dispiriting damp oppressive wintry windy garden variety garden-variety gray grey average endless hack trivial puerile overused unproductive unprogressive inactive without variety overworked bleak dowdy plain pointless vacant half-pie OK so-so monotonic all the same reiterated recurrent sing-song samely unchanged one-horse long-drawn-out unfeeling milk-and-water watery unexcited expressionless mat dulled unexpressive matte middle-of-the-road clichéd uninflected phoned in truistic dead-and-alive flat as pancake puts one to sleep unseasoned unpalatable blind sapless muted whitebread not so hot simplistic crude meager meagre out of date inoffensive unobjectionable outdated harmless old-fashioned lead balloon namby-pamby uncharismatic mainstream outmoded safe archaic halfhearted diluted obsolete defunct extinct antiquated antediluvian superannuated boiled down without punch hoary passé cliché-ridden timeworn antwacky out of the ark worn out played out cut and dried time-worn graceless inelegant ungainly gauche ungraceful rough-hewn rigid uncomfortable rustic rustical uneasy gawky unimpassioned maladroit bumbling inept unhandy inflexible deadpan inexpressive obstinate unyielding unbending lacking vitality pale faded subdued lustreless pallid washed out somber sombre soft unlustrous dingy dark pastel apathetic torpid ashen toned down lowered faint ashy washed-out restrained listless tasteless subfusc poor subtle inadequate low-key illustrous black understated half-hearted softened dull-coloured thin matt muffled stifled ineffectual ineffective suppressed dark-colored low hushed toned-down inaudible mild static pathetic achromatic dark-coloured unobtrusive shaded deadened light unconvincing wan passive drivelling driveling uncolored watered-down mellow mute achromic lackadaisical washy silenced enervated indiscernible gentle waterish unpolished mumbled unclear flat tire imperceptible low-pitched dirty greyish lethargic puny unenthusiastic useless emotionless desiccated beige hollow futile strangled unburnished profitless bleached flimsy cold unsuccessful fruitless vigourless conservative shallow clear paltry etiolated tenuous grayish distasteful unappetizing savorless unsavory languid gloomy smothered implausible whispered obscure irresolute slothful mousy indecisive muddy meek inarticulate lacking in vitality languorous unintelligible sober unsavoury unhearable without color long prosing nonglossy inferior inert impotent powerless least Milquetoast unmodulated undemonstrative wordy long-winded trying frustrating shadeless tingeless disinterested delicate darkish cautious filthy circumspect unimpressive unsatisfactory discoloured discolored watered down in the doldrums unsentimental unvarnished unembellished unpoetic nitty-gritty literal terrestrial unemotional factual unadorned unfateful noneventful unnoteworthy inconclusive nerdy wimpy unappealing prudent nebbish fatuous slight reluctant perfunctory vigorless energyless unostentatious unpretentious chary lurid ghastly cadaverous sickly white waxen doughy blanched livid soft-hued sooty dun grimy sludgy vain reserved attentive two-dimensional unenergetic lukewarm unresponsive weakly backward unrewarding timid spent backwoods comatose gingerly considerate careful heedful wary calculating unwilling impassive cool blasé devoid of feeling devoid of emotion worthless murky sullied tarnished opaque lacking energy greyscale grayscale aimless valueless unprofitable purposeless not shiny discreet unenterprising behind the times otiose unavailing bootless inefficacious abortive murmuring leery insufficient hueless unfruitful unfilled unprolific inconspicuous vague diminished muttering faltering light-toned sour uncoloured insubstantial unnoticeable repressed unflashy simple cream hoarse hazy fuzzy black and white tintless not in color black-and-white low-keyed scarcely audible out of earshot bated ill-defined greige sand superficial unbelievable distant reedy unstressed unaccented taupe oatmeal spoiled droopy ecru improbable untenable questionable buff fawn submissive melancholic dejected spineless languishing melancholy dispirited despondent mopy weak-kneed inconceivable sketchy unpersuasive incredible blue down cowardly disconsolate gutless dopey inanimate unconcerned broken downhearted sad drippy turned off stone-coloured indefinite stone mushroom light-colored putty down in the mouth down in the dumps cast down light-coloured stinking malodorous noisome foetid spoilt stenchy fetid dried parched reeking smelly thudding

hard to explain hard to feel sympathy for hard to find hard to follow hard to get along with hard to get to hard to describe hard to define hard to connect with hard to come by hard to believe hard to bear