彼らは熱意が足りないために失敗したにちがいない。

Sentence Analyzer

彼ら 熱意 足りない ために 失敗した ちがいない

English Translation

They must have failed through lack of enthusiasm.

Furigana

(かれ)らは熱意(ねつい)()りないために失敗(しっぱい)したにちがいない。

Romanji

Karera wa netsui ga tarinai tameni shippaishita ni chigainai.

Words

彼ら (かれら)
they (usually male); them
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
熱意 (ねつい)
zeal; enthusiasm
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
足りる (たりる)
to be sufficient; to be enough; to be worth doing; to be worthy; to be sufficient; to answer; to do
為に (ために)
for; for the sake of; to one's advantage; in favor of; in favour of; on behalf of; because of; as a result of
失敗 (しっぱい)
failure; mistake; blunder
()
at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although
近い (ちかい)
near; close; short (distance)

Kanji

Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: ネツ、 あつ.い
Meanings: heat, temperature, fever, mania, passion
Reading: 
Meanings: idea, mind, heart, taste, thought, desire, care, liking
Readings: ソク、 あし、 た.りる、 た.る、 た.す
Meanings: leg, foot, be sufficient, counter for pairs of footwear
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