二に段だん

noun which may take the genitive case particle 'no'

double; two-stage

Used as a no-adjective to describe something having two levels, steps, or stages. Common in compound terms like 二段ベッド (bunk bed) or 二段階 (two-stage).

• 子こ供ども部屋べやに二に段だんベッドを置おいた。

  We put a bunk bed in the children's room.

• このロケットは二に段だん式しきだ。

  This rocket is a two-stage type.

noun

second dan (rank)

Refers to the second rank in martial arts (judo, karate, etc.), board games (go, shogi), and similar grading systems. Often used with the name of the discipline, e.g., 柔道二段.

• 彼かれは柔じゅう道どう二に段だんの腕うで前まえだ。

  He holds a second dan in judo.

• 将しょう棋ぎで二に段だんになるのは難むずかしい。

  It's difficult to reach second dan in shogi.

noun

nidan (verb class)

In Japanese grammar, refers to the nidan (bigrade) verb conjugation class of classical Japanese, which had two base forms for vowel-stem verbs. Modern ichidan verbs evolved from this class. Technical term used in linguistic or historical contexts.

See also: 五段

• 古こ典てん文ぶん法ぽうでは、上かみ一いち段だん・下しも一いち段だんの動どう詞しを二に段だん活かつ用ようと呼よぶ。

  In classical grammar, upper and lower bigrade verbs are called nidan conjugation.

• 「起きく」は二に段だん動どう詞しの例れいだ。

  'Oku' is an example of a nidan verb.