menace

nouns

something that is a source of danger
"earthquakes are a constant threat in Japan"
a threat or the act of threatening
"he spoke with desperate menace"
is a type of (narrower)
declaration of an intention or a determination to inflict harm on another
"his threat to kill me was quite explicit"

verbs

pose a threat to; present a danger to
"The pollution is endangering the crops"
express a threat either by an utterance or a gesture
"he menaced the bank manager with a stick"
is a type of (narrower)
give expression to
"She showed her disappointment"
act in a threatening manner
"A menacing person"
is a type of (narrower)
behave in a certain manner; show a certain behavior; conduct or comport oneself
"You should act like an adult"; "Don't behave like a fool"; "What makes her do this way?"; "The dog acts ferocious, but he is really afraid of people"