こいつの性根が悪いから非モテなんだろ。
Sentence Analyzer
English Translation
        I expect it's his lousy personality that drives off the ladies.
    
Furigana
        こいつの性根 が悪 いから非 モテなんだろ。
    
Romanji
        Koitsu no shōkon ga warui kara hi mote na n daro.
    
Words
            
                此奴
            
            
                (こいつ、こやつ)
            
        
        
            this fellow; this guy; this person
        
    
            
                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
        
    
            
                性根
            
            
                (しょうこん)
            
        
        
            perseverance
        
    
            
                が
            
            
                (が)
            
        
        
            indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
        
    
            
                悪い
            
            
                (わるい)
            
        
        
            bad; poor; inferior; evil; sinful; unprofitable; unbeneficial; at fault; to blame; in the wrong; sorry
        
    
            
                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
        
    
            
                非
            
            
                (ひ)
            
        
        
            fault; error; mistake; going poorly; being disadvantageous; being unfavorable; un-; non-; an-
        
    
            
                面
            
            
                (おもて、おも、も、もて)
            
        
        
            face; surface; mask (esp. a noh or kyogen mask)
        
    
            
                だ
            
            
                (だ)
            
        
        
            be; is; indicates past or completed action; indicates light imperative
        
    
            
                ん
            
            
                (ん)
            
        
        
            yes; yeah; uh huh; negative verb ending used in informal speech (abbr. of negative verb ending "nu"); abbr. of particle "no"; abbr. of particle "ni" (used especially when it precedes the verb "naru")
        
    Kanji
Readings: セイ、 ショウ、 さが
                        Meanings: sex, gender, nature
                    Readings: コン、 ね、 -ね
                        Meanings: root, radical, head (pimple)
                    Readings: アク、 オ、 わる.い、 わる-、 あ.し、 にく.い、 -にく.い、 ああ、 いずくに、 いずくんぞ、 にく.む
                        Meanings: bad, vice, rascal, false, evil, wrong
                    Readings: ヒ、 あら.ず
                        Meanings: un-, mistake, negative, injustice, non-