そんな大切なことを忘れるとは、君はずいぶん不注意だね。

Sentence Analyzer

そんな 大切な こと 忘れる ずいぶん 不注意

English Translation

How careless you are to forget such an important thing!

Furigana

そんな大切(たいせつ)なことを(わす)れるとは、(きみ)はずいぶん不注意(ふちゅうい)だね。

Romanji

Sonna taisetsuna koto o wasureru to wa, kimi wa zuibun fuchūi da ne.

Words

そんな (そんな)
such (about the actions of the listener, or about ideas expressed or understood by the listener); like that; that sort of
大切 (たいせつ、たいせち)
important; necessary; indispensable; beloved; precious; dear; cherished; valuable; careful
(こと、こん)
thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as
()
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
忘れる (わすれる)
to forget; to leave carelessly; to be forgetful of; to forget about; to forget (an article)
()
if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
(きみ)
you; buddy; pal; monarch; ruler; sovereign; (one's) master
随分 (ずいぶん)
very; extremely; surprisingly; considerably; contemptible; reprehensible
不注意 (ふちゅうい)
carelessness; inattention; thoughtlessness
()
be; is; indicates past or completed action; indicates light imperative
(ね、ねえ)
indicates emphasis, agreement, request for confirmation, etc.; is it so; hey; come on; listen; not

Kanji

Readings: ダイ、 タイ、 おお-、 おお.きい、 -おお.いに
Meanings: large, big
Readings: セツ、 サイ、 き.る、 -き.る、 き.り、 -き.り、 -ぎ.り、 き.れる、 -き.れる、 き.れ、 -き.れ、 -ぎ.れ
Meanings: cut, cutoff, be sharp
Readings: ボウ、 わす.れる
Meaning: forget
Readings: クン、 きみ、 -ぎみ
Meanings: mister, you, ruler, male name suffix
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