presumptuous (adjective) presumptuous: self-confident
Detalii: presumptive means 'based on a presumption, based on grounds of probability' while presumptuous means 'assuming an unwarranted, unauthorized responsibility'
Sinonime: extraordinary,
fantastic, imcomprehensible,
implausible, impossible, improbable, incogitable, incredible, insupposable, mind-boggling,
phony,
rare, reachy,
staggering,
strange, thin*, unbelievable, unconvincing, unheard-of,
unimaginable, unknowable,
unlikely, unsubstantial, unthinkable, weak*, won't fly, won't wash
Antonime: believable, conceivable, fathomable, imaginable, reasonable