彼の失敗は大部分不注意のせいだった。

Sentence Analyzer

失敗 部分 不注意 せい だった

English Translation

His failure was mainly due to carelessness.

Furigana

(かれ)失敗(しっぱい)(だい)部分(ぶぶん)不注意(ふちゅうい)のせいだった。

Romanji

Kare no shippai wa dai bubun fuchūi no sei datta.

Words

(かれ)
he; him; his; boyfriend
()
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
失敗 (しっぱい)
failure; mistake; blunder
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
(おお)
big; large
部分 (ぶぶん)
portion; section; part
不注意 (ふちゅうい)
carelessness; inattention; thoughtlessness
所為 (せい、せえ)
consequence; outcome; result; blame
()
be; is; indicates past or completed action; indicates light imperative

Kanji

Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: シツ、 うしな.う、 う.せる
Meanings: lose, error, fault, disadvantage, loss
Readings: ハイ、 やぶ.れる
Meanings: failure, defeat, reversal
Readings: ダイ、 タイ、 おお-、 おお.きい、 -おお.いに
Meanings: large, big
Readings: ブ、 -べ
Meanings: section, bureau, dept, class, copy, part, portion, counter for copies of a newspaper or magazine
Readings: ブン、 フン、 ブ、 わ.ける、 わ.け、 わ.かれる、 わ.かる、 わ.かつ
Meanings: part, minute of time, segment, share, degree, one's lot, duty, understand, know, rate, 1%, chances, shaku/100
Readings: フ、 ブ
Meanings: negative, non-, bad, ugly, clumsy
Readings: チュウ、 そそ.ぐ、 さ.す、 つ.ぐ
Meanings: pour, irrigate, shed (tears), flow into, concentrate on, notes, comment, annotate
Reading: 
Meanings: idea, mind, heart, taste, thought, desire, care, liking