いいしれぬ (translations)→ indescribable ineffable nameless peculiar some
えもいわれぬ (translations)→ exquisitely indescribably
異様な (translations)→ bizarre deeply disturbed ghostly grisly odd out-of-kilter remarkable screwed-up strange twisted untoward unusual weird wonderfully
重大な (translations)→ big crucial delicate important quantum ultimate