forewarn (someone) in advance

Translations
предупредить (кого-то) заранее
The teacher forewarned the students in advance about the test.
Учитель заранее предупредил студентов о тесте.
Definitions
To inform or alert someone about a potential event or situation before it occurs, allowing them to prepare or take necessary precautions.
Words
forewarn

verb
предупреждать заранее
someone

pronoun
кого то
in

preposition
в
advance

noun
заранее