{"en_key":"an unknown quantity","headword":"unknown","is_phrasal":true,"sense":"an unknown quantity","explanation":"someone or something that you do not know and so you cannot be certain about","level":"C2","ps":"adjective","sub":null,"ua_renderings":[],"avoid":[],"examples":[],"evidence":{"concordance":{"n_matches":0,"samples":[]},"e2u":{"n_dicts":0,"n_rows":0,"rows":[],"url":"https://e2u.org.ua/s?w=an%20unknown%20quantity&highlight=on"},"balla":{"n_matches":0,"contexts":[]},"atoms":[]},"n_sources_with_hits":0,"evp_dictionary_examples":["The road conditions in that area are a bit of an unknown quantity."],"confidence_summary":{"high":0,"medium":0,"tentative":0,"total":0}}