(a.) Not capable of being mixed or blended; as oil and water\.

acrid adversary adversative adverse adversive aggressive alien anti antipathetic antithetic antonymous at cross-purposes at loggerheads at odds at variance at war averse balancing battling bellicose belligerent bitter bloodthirsty bloody bloody-minded breakaway caustic chauvinist chauvinistic clashing colliding combative compensating competitive con conflicting confronting contentious contradicting contradictory contradistinct contrapositive contrarious contrary contrasted converse counter counteractant counteracting counteractive counterbalancing counterpoised countervailing counterworking cranky cross crotchety dead against despiteful detrimental differing difficult disaccordant disagreeable disagreeing discordant discrepant disharmonious disinclined disproportionate dissentient dissident dissonant divergent enemy eyeball to eyeball ferocious fierce fighting fractious full of fight full of hate grating hard harmful hateful hawkish hostile immiscible in opposition inaccordant incompatible inconsistent inconsonant indisposed inharmonious inimical inverse jangling jarring jingo jingoish jingoist jingoistic malevolent malicious malignant martial militant militaristic military miserable negative nonconformist noncooperative not easy obstinate obverse offensive opponent opposed opposing opposite oppositional oppositive oppugnant out of accord out of whack overthwart perverse pugnacious quarrelsome rancorous reactionary reactive recalcitrant refractory renitent repugnant resistant reverse revolutionary rigorous rival saber-rattling sanguinary sanguineous savage scrappy set against sinister soldierlike soldierly sore spiteful squared off stressful trigger-happy troublesome troublous truculent trying uncongenial uncooperative unfavorable unfriendly unharmonious unpacific unpeaceable unpeaceful unpropitious untoward unwilling variant venomous virulent vitriolic warlike warmongering warring wretched