na-adjective, noun which may take the genitive case particle 'no'
Describes something or someone that is oddly different from the norm, often with a nuance of being strangely unique or unconventional. Can be used for people, behavior, atmosphere, or appearance.
His outfit was so peculiar that people around him were staring.
その部屋には一種異様な雰囲気が漂っていた。
There was a strangely unique atmosphere in that room.