彼の弟が突然亡くなったので彼らは驚いた。

Sentence Analyzer

突然 亡くなった ので 彼ら 驚いた

English Translation

The sudden death of his brother surprised them.

Furigana

(かれ)(おとうと)突然(とつぜん)()くなったので(かれ)らは(おどろ)いた。

Romanji

Kare no otōto ga totsuzen nakunatta node karera wa odoroita.

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
(おとうと、おと、おとと、てい)
younger brother; little brother; kid brother; pupil; apprentice
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
突然 (とつぜん)
abrupt; sudden; unexpected; all at once
亡くなる (なくなる)
to die
ので (ので、んで)
that being the case; because of ...; the reason is ....; given that...
彼ら (かれら)
they (usually male); them
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
驚く (おどろく)
to be surprised; to be astonished

Kanji

Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: テイ、 ダイ、 デ、 おとうと
Meanings: younger brother, faithful service to elders
Readings: トツ、 カ、 つ.く
Meanings: stab, protruding, thrust, pierce, prick, collision, sudden
Readings: ゼン、 ネン、 しか、 しか.り、 しか.し、 さ
Meanings: sort of thing, so, if so, in that case, well
Readings: ボウ、 モウ、 な.い、 な.き-、 ほろ.びる、 ほろ.ぶ、 ほろ.ぼす
Meanings: deceased, the late, dying, perish
Readings: キョウ、 おどろ.く、 おどろ.かす
Meanings: wonder, be surprised, frightened, amazed