46 entries under idiom topic. ×
| unknown quantity(noun, expression, doubt, doubtfulness) | |
| terra incognita(noun, expression) | |
| unknown region(noun, expression) | |
| dark horse(noun, expression, possibility) | |
| be born(verb, expression) | |
| frontiers of knowledge | |
| in a cloud | |
| in a fog | |
| in the dark(expression, obscure, dark, hidden) | |
| in the wings | |
| life after death | |
| life to come | |
| matter of ignorance | |
| no credit to | |
| out of view(expression, obscure, dark, hidden) | |
| under an eclipse | |
| under house arrest | |
| what is fated | |
| without a name | |
| world beyond(noun, expression, world) |
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| APA | Smart Define. (2015). unknown thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unknown/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unknown thesaurus" https://smartdefine.org/unknown/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, unknown thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unknown/thesaurus/synonyms>. |
| MLA | Smart Define. "unknown thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/unknown/thesaurus/synonyms> |