AnalyzerSentence analysis3SpansSentence勢いがなくなる1000 character limitAnalyzeSentence勢いきおいがなくなるSpan Details勢いきおいforce; vigor; energy; power; influence; authority; momentum; impetus; impulse; inevitably; naturally; necessarilynoun, adverbがsubject markergrammarなくなるpass away; die-> 亡くなるgodan verb