AnalyzerSentence analysis2SpansSentence永遠不変1000 character limitAnalyzeSentence永えい遠えん不ふ変へんSpan Details永えい遠えんeternity; perpetuity; permanence; immortalitynoun, no-adjective不ふ変へんunchanging; constant; eternal; immutable; invariantna-adjective, noun