Verb
must not (third-person singular simple present must not, no present participle, no simple past or past participle)
Used to indicate that something is forbidden.
Pedestrians must not cross the road until the light goes green.
Synonyms: must refrain from, be not to
A Christian must not be fanatical; he must have love for and be sensitive towards all people. Paisios of Mount Athos
Once a woman has forgiven her man, she must not reheat his sins for breakfast. Marlene Dietrich
One cannot and must not try to erase the past merely because it does not fit the present. Golda Meir
He who wants to go fishing must not be afraid of the water. Hungarian Proverb
Не that goes barefoot must not plant thorns. English Proverb
Children and fools must not play with edged tools. English Proverb