妹は心ゆくまで笑った。
Sentence Analyzer
English Translation
        My sister laughed to her heart's content.
    
Furigana
Romanji
        Imōto wa kokoroyuku made waratta.
    
Words
            
                妹
            
            
                (いもうと)
            
        
        
            younger sister
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                迄
            
            
                (まで)
            
        
        
            until (a time); till; to; up to; to (a place); as far as; to (an extent); up to; so far as; even; only; merely
        
    
            
                笑う
            
            
                (わらう)
            
        
        
            to laugh; to smile; to sneer; to ridicule; to be dumbfounded; to be flabbergasted