Answer: stumbled

AnswerCrossword Clue
STUMBLEDHappened (on).
STUMBLEDMade a slip
stumbledMake a mistake or repeated mistakes in speaking
stumbledSTUMBLE, to trip when walking or running
stumbledTrip repeatedly as one walks
stumbledTrip or momentarily lose one's balance; almost fall
stumbledFind or encounter by chance