Webster’s Revised Unabridged Dictionary · 1913
Topple
Top′ple (tŏp′p'l), v. i. [imp. & p. p. Toppled; p. pr. & vb. n. Toppling.] [From Top summit.] To fall forward; to pitch or tumble down.
Though castles topple on their warders' heads. Shak.
Top′ple, v. t. To throw down; to overturn.
He topple crags from the precipice. Longfellow.