いけない

Japanese

Alternative spelling
行けない

Etymology

Negative form of 行ける (ikeru), the potential form of 行く (iku).

Adjective

いけない • (ikenai) -i (adverbial いけなく (ikenaku))

  1. bad, naughty
    いけない()
    Ikenai ko da ne.
    You're a naughty child.
  2. (ては~) it's bad if...
    宿(しゅく)(だい)をしなくてはいけない
    Shukudai o shinakute wa ikenai.
    I have to do my homework.
    (literally, “It's bad if I don't do my homework.”)
    ポイ()してはいけない
    Poisute shite wa ikenai.
    Please don't litter.
    (literally, “It's bad to litter.”)

Usage notes

The “it's bad if …” sense is similar to ならない (naranai) or だめ (dame), but appeals to morals instead of rules. ならない (naranai) is used for something you're not allowed to do, and いけない (ikenai) is used for something that you shouldn't do because it brings about an unwanted result. However, this doesn't mean that いけない (ikenai) (e.g. in ~てはいけない (~te wa ikenai)) makes it a request instead of a demand.

Inflection

Synonyms

Interjection

いけない • (ikenai) 

  1. Oh no!
    いけない()(こく)する!
    Ikenai, chikoku suru!
    Oh no! I'm going to be late!
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