Unique
Peculiar
noun, な adjective, の adjective
It is alone and special. Nothing is like it. It is very unique and peculiar.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
この香辛料は独特の香りがする。
These spices have a unique aroma.