| noun | an unknown and unexplored region “they came like angels out the unknown” |
| noun | anyone who does not belong in the environment in which they are found |
| noun | a variable whose values are solutions of an equation |
| adjective | not known “an unknown amount” |
| adjective | being or having an unknown or unnamed source “a poem by an unknown author” |
| adjective | not known to exist “things obscurely felt surged up from unknown depths” |
| adjective | not famous or acclaimed “an obscure family” |
| adjective | not known before “used many strange words” |
| alien | adjective | being or from or characteristic of another place or part of the world |
| unknown | adjective | not known |
| unknown | noun | anyone who does not belong in the environment in which they are found |
| namelessness | noun | the state of being anonymous |
| obscurity | noun | an obscure and unimportant standing; not well known |
| obscureness | noun | the state of being humble and unimportant |
| strangeness | noun | unusualness as a consequence of not being well known |