bare (one's) teeth

Translations
оскалить (свои) зубы
The dog bared its teeth when the stranger approached.
Собака оскалила зубы, когда к ней подошел незнакомец.
Definitions
To show hostility or aggression, often as a warning or threat; originally referring to animals showing their teeth as a sign of readiness to attack.
Words
tooth

noun
зуб
bare

verb
обнажать