彼らの息子は大きくなりました。
Sentence Analyzer
English Translation
        Their son grew bigger.
    
Furigana
Romanji
        Karera no musuko wa ōkiku narimashita.
    
Words
            
                彼ら
            
            
                (かれら)
            
        
        
            they (usually male); them
        
    
            
                の
            
            
                (の)
            
        
        
            indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
        
    
            
                息子
            
            
                (むすこ、そく)
            
        
        
            son; penis
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                大きい
            
            
                (おおきい)
            
        
        
            big; large; great; loud
        
    
            
                成る
            
            
                (なる)
            
        
        
            to become; to get; to grow; to be; to reach; to attain; to result in; to prove to be; to consist of; to be composed of; to succeed; to be complete; to change into; to be exchanged for; to play a role; to be promoted; to do ...