彼が失敗したのは怠けたせいだ。
Sentence Analyzer
English Translation
His failure was due to his idleness.
Furigana
Romanji
Kare ga shippaishita no wa namaketa sei da.
Words
彼
(かれ)
he; him; his; boyfriend
が
(が)
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
失敗
(しっぱい)
failure; mistake; blunder
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
は
(は)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
怠ける
(なまける)
to be idle; to slacken; to neglect (e.g. one's work)
所為
(せい、せえ)
consequence; outcome; result; blame
だ
(だ)
be; is; indicates past or completed action; indicates light imperative