a safe bet
US /ə seɪf bet/
UK /ə seɪf bet/
1.
kesin, garanti
something that is certain to happen or to be successful
:
•
It's a safe bet that the new restaurant will be popular.
Yeni restoranın popüler olacağı kesin.
•
Given his track record, he's a safe bet for the promotion.
Geçmişine bakılırsa, terfi için kesin bir aday.