Where does this definition of stumble upon come from?
This entry for stumble upon is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is stumble upon a noun, verb, or something else?
In this entry, stumble upon is tagged as 2v..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.