Meaning of いけません in Japanese

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Definition of いけません

いけません(ikemasen) 【行けません】

ないといけません(naitoikemasen) 【ないと行けません ·無いといけません ·無いと行けません】

(exp) (after negative base of verb) have to (verb); must (verb) →Related words: ないと行けない
is indispensable; absolutely necessary →Related words: ないと行けない

「悪い風邪わるいかぜを引きました」「それはいけませんね」

"I caught a bad cold." "That's too bad."

You will have to get up early tomorrow morning.

You must take care of yourself.

あなたは私のわたしペンぺんを使ってはいけません。

You mustn't use my pen.

You mustn't swim in the pond.

You are not to sleep in this room.

「風邪気味かぜぎみです」「それはいけませんね」

"I've a touch of a cold." "That's too bad."

"Mom, please can I have a biscuit?" "No, you can't; you shouldn't eat between meals."

"May I take this umbrella?" "No, you may not."

「ここに駐車ちゅうしゃしてするもよろしいですか」「いいえ、いけません」

"May I park here?" "No, you must not."