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Kotomora

ならない

also: ならぬ · ならん · なりません

な
ら
な
い
Common word

Meanings

1

expression

cannot help feeling; unbearably; irresistibly

Used as てならない or with adjective-like continuative forms such as 心配でならない and 嬉しくてならない. It emphasizes that a feeling or sensation arises strongly and cannot be suppressed.

2

expression

must not; should not

Used as てはならない to state prohibition. It is firmer and more rule-like than conversational てはいけない, and often appears in instructions, rules, principles, or formal writing.

3

expression

must; have to; ought to

Used in obligation patterns such as なくてはならない, なければならない, and the more literary ねばならない. It means that something is required or unavoidable.

4

expression

cannot; unable to

Limited modern use outside the major grammar patterns. It is most natural in fixed expressions such as 我慢ならない, meaning that one cannot bear, allow, or accept something.

5

expression

not

dated term

Dated use as ではならない meaning simple negation, roughly ではない. In modern Japanese, ではならない is usually interpreted differently, so this sense is mainly for reading older texts.