Merriam-Webster's Dictionary and Thesaurus - Merriam-Webster [696]
2 : the force of impression of one thing on another : EFFECT
Synonyms
[1] bump, collision, concussion, crash, jar, jolt, shock, smash, strike, wallop; also blow, buffet, hit, knock, punch, rap, slap, thump; bashing, bludgeoning, clobbering, hammering, licking, pounding, pummelling, thrashing; contact, encounter, meeting, touch
[2] effect, influence, mark, repercussion, sway—more at EFFECT
im·pact·ed adjective 1 : packed or wedged in
2 : wedged between the jawbone and another tooth
im·pair verb : to diminish in quantity, value, excellence, or strength : DAMAGE, LESSEN
— im·pair·ment noun
im·paired adjective : being in a less than perfect or whole condition; especially : disabled or functionally defective — often used in combination im·pa·la noun, plural impalas or impala : a large brownish African antelope that in the male has slender curved horns with ridges im·pale verb im·paled; im·pal·ing : to pierce with or as if with something pointed — im·pale·ment noun Synonyms gore, harpoon, lance, pierce, puncture, skewer, spear, spike, stab, stick, transfix; also spindle; perforate; jab, poke, prick, punch, thrust; cut, knife, slice im·pal·pa·ble adjective 1 : unable to be felt by touch : INTANGIBLE 2 : not easily seen or understood — im·pal·pa·bly adverb Synonyms imperceptible, inappreciable, indistinguishable—more at IMPERCEPTIBLE im·pan·el verb : to enter in or on a panel : ENROLL <~ a jury> im·part verb 1 : to give from one's store or abundance 2 : to make known Synonyms [1, 2] communicate, convey, spread, transfer, transfuse, transmit—more at COMMUNICATE im·par·tial adjective : not partial : UNBIASED, JUST — im·par·tial·ly adverb Synonyms disinterested, dispassionate, equal, equitable, fair, just, nonpartisan, objective, square, unbiased, unprejudiced—more at FAIR im·par·tial·i·ty noun : the quality or state of being impartial : freedom from bias or favoritism Synonyms detachment, disinterestedness, neutrality, objectivity—more at DETACHMENT im·pass·able adjective : incapable of being passed, traversed, or crossed <~ roads> — im·pass·ably adverb Synonyms impenetrable, impervious im·passe noun 1 : an impassable road or way 2 : a predicament from which there is no obvious escape Synonyms deadlock, halt, stalemate, standstill; also dead end; bottleneck, corner, dilemma, fix, hole, jam, pickle, pinch, plight, predicament, quagmire, quandary, spot; difficulty; problem im·pas·si·ble adjective : incapable of feeling : IMPASSIVE im·pas·sioned adjective : filled with passion or zeal : showing great warmth or intensity of feeling Synonyms ardent, burning, charged, emotional, fervent, feverish, fiery, glowing, hot-blooded, passionate, red-hot, vehement, warm—more at FERVENT im·pas·sive adjective : showing no signs of feeling, emotion, or interest : EXPRESSIONLESS; also : lacking or not feeling emotion — im·pas·sive·ly adverb Synonyms blank, deadpan, expressionless, inexpressive, stolid, vacant—more at BLANK apathetic, cold-blooded, phlegmatic, stoic, stolid, unemotional; also cold, cool, dispassionate, unmoved; calm, collected, composed; unflappable; reserved, reticent, taciturn; blank, empty, deadpan, dry, expressionless, inexpressive, vacant, wooden; enigmatic, impenetrable, inscrutable; aloof, detached, unconcerned, unsentimental; impersonal, objective, unresponsive; unfeeling, pitiless; inconsiderate, thoughtless Antonyms demonstrative, emotional, fervent, fervid, hot-blooded, impassioned, passionate im·pas·siv·i·ty noun : the quality or state of being impassive : lack or absence of feeling or expression Synonyms apathy, numbness, phlegm, stupor—more at APATHY im·pas·to noun : the thick application of a pigment to a canvas or panel in painting; also : the body of pigment so applied im·pa·tience noun : the quality or state of being impatient