(informal) To discover or understand something.

Third-person singular simple present indicative form of tumble

simple past tense and past participle of tumble

A fall, especially end over end. / A disorderly heap. / (informal) An act of sexual intercourse.

(intransitive) To fall end over end; to roll over and over. / (intransitive) To perform gymnastics such as somersaults, rolls, and handsprings. / (intransitive) To drop rapidly.

simple past tense and past participle of tumble to

Third-person singular simple present indicative form of tumble to

simple past tense and past participle of tumble on

Third-person singular simple present indicative form of tumble on

(transitive, idiomatic) To accidentally encounter (a person or situation).