"Ignotus" is a Latin word that means "unknown" or "unfamiliar". There are various synonyms for it, and they are all employed depending on the context and the degree of unfamiliarity or obscurity. Some of the synonyms for "ignotus" include "unidentified", "unexplored", "undiscovered", "mysterious", "obscure", "unfathomed", "unascertained", "anonymous", "nameless", "unacquainted", "alien", and "strange", amongst others. These words are useful in different situations when writers or speakers intend to communicate the idea of something that is not well-known or uncertain. Being familiar with these synonyms can also enhance one's communication skills and improve their writing or speaking.