They both have the same meaning and insinuate a occurrence by chance. they can even be combined to make another expression of the same meaning "stumble across" XD I stumbled upon this river when I was on a walk. I came across this interesting and informative article when I was looking up plant types. I stumbled across this bar by accident one summer night.
@wayfarer155 yep! more often than not I see the phrase stumbled upon as something that comes in a positive light, but I think it could easily be made negative with the context of the rest of the sentence ^-^
The Language Level symbol shows a user's proficiency in the languages they're interested in. Setting your Language Level helps other users provide you with answers that aren't too complex or too simple.
Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
Can understand long, complex answers.
This answer was given within 60 minutes of the question being posted.
How do you say "Hello" in Korean? Find out on HiNative!