번번이 + verb (번번이 실패하다)
every time, each and every time, invariably
Example
그는 시험에 번번이 떨어졌어요.
He failed the exam every single time.
Word parts
번 turn, time+번 turn, time
Literally 'turn after turn' plus -이.
Good to know
Usually for repeated bad outcomes, unlike neutral 매번.
Related words