講師は本題から脱線してしまった。
Sentence Analyzer
English Translation
        The speaker wandered away from the subject.
    
Furigana
Romanji
        Kōshi wa hondai kara dassenshiteshimatta.
    
Words
            
                講師
            
            
                (こうし)
            
        
        
            lecturer
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                本題
            
            
                (ほんだい)
            
        
        
            main question; real issue at hand
        
    
            
                から
            
            
                (から)
            
        
        
            from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since
        
    
            
                脱線
            
            
                (だっせん)
            
        
        
            derailment; digression; deviation
        
    Kanji
Reading: コウ
                        Meanings: lecture, club, association
                    Readings: シ、 いくさ
                        Meanings: expert, teacher, master, model, exemplar, army (incl. counter), war
                    Readings: ホン、 もと
                        Meanings: book, present, main, origin, true, real, counter for long cylindrical things
                    Reading: ダイ
                        Meanings: topic, subject
                    Readings: ダツ、 ぬ.ぐ、 ぬ.げる
                        Meanings: undress, removing, escape from, get rid of, be left out, take off
                    Readings: セン、 すじ
                        Meanings: line, track