彼のやっていることを知ったのは全く偶然だった。
Sentence Analyzer
English Translation
        It was entirely by chance that I found out what he was doing.
    
Furigana
Romanji
        Kare no yatteiru koto o shitta no wa mattaku gūzen datta.
    
Words
            
                彼
            
            
                (かれ)
            
        
        
            he; him; his; boyfriend
        
    
            
                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
        
    
            
                遣る
            
            
                (やる)
            
        
        
            to do; to undertake; to perform; to play (a game); to study; to send; to dispatch; to despatch; to put; to move; to turn (one's head, glance, etc.); to give (esp. to someone of equal or lower status); to let have; to present; to bestow; to confer; to make (a vehicle) go faster; to run (a business); to keep; to be engaged in; to practice (law, medicine, etc.); to practise; to have (food, drink, etc.); to eat; to drink; to smoke; to hold (a performance); to perform; to show; to ease (one's mind); to harm; to injure; to kill; to have sex with; to live; to get by; to get along; to do ... completely; to do ... broadly; to do ... to a great distance; to do ... for (someone of equal or lower status); to do ... to (sometimes with negative nuance); to make active efforts to ...
        
    
            
                事
            
            
                (こと、こん)
            
        
        
            thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as
        
    
            
                を
            
            
                (を)
            
        
        
            indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
        
    
            
                知る
            
            
                (しる)
            
        
        
            to be aware of; to know; to be conscious of; to cognize; to cognise; to notice; to feel; to understand; to comprehend; to grasp; to remember; to be acquainted with (a procedure); to experience; to go through; to learn; to be acquainted with (a person); to get to know; to concern
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                全く
            
            
                (まったく)
            
        
        
            really; truly; entirely; completely; wholly; perfectly; indeed; good grief (expression of exasperation)
        
    
            
                偶然
            
            
                (ぐうぜん)
            
        
        
            (by) chance; unexpectedly; suddenly; accident; fortuity; by coincidence
        
    
            
                だ
            
            
                (だ)
            
        
        
            be; is; indicates past or completed action; indicates light imperative
        
    Kanji
Readings: ヒ、 かれ、 かの、 か.の
                        Meanings: he, that, the
                    Readings: チ、 し.る、 し.らせる
                        Meanings: know, wisdom
                    Readings: ゼン、 まった.く、 すべ.て
                        Meanings: whole, entire, all, complete, fulfill
                    Readings: グウ、 たま
                        Meanings: accidentally, even number, couple, man & wife, same kind
                    Readings: ゼン、 ネン、 しか、 しか.り、 しか.し、 さ
                        Meanings: sort of thing, so, if so, in that case, well