olemus
Wiktionary, adj:
1. (not comparable) being the only one of its kind; unequaled, unparalleled or unmatched
Synonyms: one of a kind, sui generis, singular
2. of a feature, such that only one holder has it
3. particular, characteristic
4. (proscribed) of a rare quality, unusual
https://en.wikipedia.org/wiki/Uniqueness