simple past tense and past participle of topple

(transitive) To push, throw over, overturn or overthrow something. / (intransitive) To totter and fall, or to lean as if about to do so.

Third-person singular simple present indicative form of topple

present participle of topple

The act by which something is toppled.

plural of toppling

(idiomatic) To fall over (to fall from an upright or standing position to a horizontal or prone position).