AnalyzerSentence analysis2SpansSentenceそっと呟く1000 character limitAnalyzeSentenceそっと呟つぶやくSpan Detailsそっとsoftly; gently; quietly; stealthily; secretly; leave alone; leave as isadverb呟つぶやくmutter; murmur; grumble; tweet; post on Twittergodan verb