彼が失敗したのは怠けたせいだ。

Sentence Analyzer

彼が失敗したのは怠けたせいだ。

English Translation

His failure was due to his idleness.

Furigana

彼(かれ)が失敗(しっぱい)したのは怠(なま)けたせいだ。

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