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Out-dated kanji
Noun (futsuumeishi)
red, crimson, scarlet

red-containing colour (e.g. brown, pink, orange)
often written as アカ
Red (i.e. communist)

See also: 赤信号
red light

See also: 赤字, 1
See also: 赤字, 2
red ink (i.e. in finance or proof-reading), (in) the red

May take the particle 'no'
Noun, used as a prefix
See also: 赤の他人
complete, total, perfect, obvious

Meaning restricted to 赤
Noun (futsuumeishi)
See also: 銅, どう
copperRot, rote Farbe, Kommunist, Roter, letzter, Korrekturen, vollkommen (nackt, fremd etc.)

ON: セキ, シャクKUN: あか, あか-, あか.い, あか.らむ, あか.らめる

ON: コウ, クKUN: べに, くれない, あか.い
crimson, deep red

ON: シュKUN: あけ
vermilion, cinnabar, scarlet, red, bloody

ON: KUN: あけ, あか
scarlet, cardinal

Example sentences
朱に交われば赤くなる。Parts: (しゅ), 交わる (まじわる), 赤い (あかい), 成る (なる)He who touches pitch shall be defiled therewith.
Celui qui touche à de la peinture rouge risque d'être taché de rouge.
Wer mit Zinnober umgeht, der wird rot davon.

サダムが脅威でないなどと言うのは、赤がかった反戦運動の人達くらい。Parts: 脅威 (きょうい), である, (など), 言う (いう), (あか), がかる, 反戦運動 (はんせんうんどう), 人達 (ひとたち), (くらい)It's only the anti-war pinkos who say things like Saddam isn't a threat.

信号機が赤の間は道路を渡るな。Parts: 信号機 (しんごうき), (あか), (あいだ), 道路 (どうろ), 渡る (わたる)Ne traverse pas la rue tant que le feu est rouge.

Community comments
The words and kanji on this web site come from the amazing dictionary files JMDict, EDICT and KANJIDIC. These files are the property of the Electronic Dictionary Research and Development Group, and are used in conformance with the Group's licence. The example sentences come from the projects Tatoeba and Tanaka Corpus. Kanji search by radicals is based on the Kradfile2 and Kradfile-u files containing radical decomposition of 13108 Japanese characters. Many thanks to all the people involved in those projects!