stumble on

1. Used other than figuratively or idiomatically: see stumble, on.

2. (figuratively, intransitive)To discover or find something by accident.

   натыка́тьсяnatykátʹsja, наткну́тьсяnatknútʹsja, ната́лкиватьсяnatálkivatʹsja

   нашто́вхуватисяnaštóvxuvatysja, наштовхну́тисяnaštovxnútysja

3. (figuratively, intransitive)To meet somebody by chance.

4. (figuratively, intransitive, with on)To continue with difficulty in one's endeavours; to struggle on.

1. Tom stumbled over something on the floor.

   CC BY 2.0 FR · Tatoeba · CK · B1Open on TatoebaReport a problem

2. Tom stumbled over something on the ground.

   ruТом о что-то споткнулся. — Karok

   CC BY 2.0 FR · Tatoeba · Airvian · B1Open on TatoebaReport a problem

3. Ziri stumbled on the uneven ground.

   CC BY 2.0 FR · Tatoeba · Amastan · C2Open on TatoebaReport a problem

4. I stumbled again on the same stone.

   CC BY 2.0 FR · Tatoeba · PauloSamuel · B1Open on TatoebaReport a problem

5. The newborn giraffe stumbled around on rickety legs.

   ruНоворождённый жираф споткнулся на слабых ногах. — astyng

   deDie neugeborene Giraffe stolperte auf wackligen Beinen umher. — Yorwba

   CC BY 2.0 FR · Tatoeba · patgfisher · C2Open on TatoebaReport a problem

irregular

• stumble onнаштовхуватися, наштовхнутисяUsed other than figuratively or idiomatically: see stumble, on.
• stumble intoTo begin a course of action by accident, while intending to do something else.
• stumble acrossTo discover or find (something) by accident.
• stumble againstTo discover or find accidentally.