{"en_key":"a vain attempt effort hope","headword":"vain","is_phrasal":true,"sense":"a vain attempt/effort/hope","explanation":"A vain attempt/effort, etc. does not have the result you want.","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=a%20vain%20attempt%20effort%20hope&highlight=on"},"balla":{"n_matches":0,"contexts":[]},"atoms":[]},"n_sources_with_hits":0,"evp_dictionary_examples":["I made a vain attempt to engage him in conversation."],"confidence_summary":{"high":0,"medium":0,"tentative":0,"total":0}}