must not

no-past no-present-participle participle past

Used to indicate that something is forbidden.

Japanese Meaning

～してはならない

Visitors must not feed the animals in the sanctuary.

訪問者は保護区で動物に餌を与えてはいけません。

Sense（1）

Used to indicate that something is forbidden.

Pedestrians must not cross the road until the light goes green.

must not

（ present singular third-person ）