fear of the unknown

Translations
страх перед неизвестным
He has a fear of the unknown when starting a new job.
У него страх перед неизвестным, когда он начинает новую работу.
Definitions
Fear of the unknown refers to the anxiety or apprehension that arises from uncertainty or unfamiliar situations, often leading to avoidance behaviors or stress due to the inability to predict outcomes.
Words
fear

noun
страх
unknown

adjective
неизвестный