monstrous
Cross references: 1. outrageous mon.strous \'ma:n(t)-str*s\ aj obs 1: STRANGE, UNNATURAL 2: having extraordinary often overwhelming size : GIGANTIC 3a: having the qualities or appearance of a monster obs 3b: teeming with monsters 4a: extraordinarily ugly or vicious : HORRIBLE 4b: shockingly wrong or ridiculous 5: deviating greatly from the natural form or character : ABNORMAL 6: very great - used as an intensive M mean extremely impressive esp. in size. MONSTROUS further implies ugliness, deformity, or fabulousness; PRODIGIOUS suggests a marvelousness exceeding belief; TREMENDOUS may imply a power to terrify or inspire awe; STUPENDOUS a power to stun or astound - mon.strous.ly av SYN syn MONSTROUS, PRODIGIOUS, TREMENDOUS, STUPENDOUS
Webster's English Dictionary