stumbles across

Discovers by chance

To stumble across something is to find or discover it by chance, without looking for it: I stumbled across some old photos while cleaning out the attic.

The phrase suggests accidental discovery—you weren't searching, but there it was.

Stumble upon means the same thing.

Related

happy accident · by accident · unearthing · chance · uncovering · lost and found · epiphany · finding · surprise · pleasant surprise · realization · recognition · curiosity · noticing · revelation · awareness · wonder · amazement

Opposites
intentionality of discovery

stumbles acrosstracks down

Locates through persistent effort

looks for · pursues · researches · investigates · targets

awareness/retention

stumbles acrossoverlooks

Misses or surveys

misses · passes by · ignores · loses

awareness/expectation

stumbles acrossanticipates

Expects before it happens

foresees · predicts · awaits

Family

stumble, stumbles, stumbled, stumbling, stumbler, stumblers, across, cross, crosses

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G