1 adverb speak, argue etc'I don't how it happened', he explained unconvincingly.'Níl a fhios agam conas a tharla sé,' a mhínigh sé go hamhrasach.2 adverb portray, play part etcar bhealach dochreidtethe film's ending plays out unconvincinglytá deireadh áiféiseach ar an scannán3 adverb to implausible degreehis explanation is unconvincingly complicatedtá an míniú a thug sé chomh casta sin gur deacair é a chreidiúint