Webster’s Revised Unabridged Dictionary · 1913
Capsize
Cap·size′, v. t. & i. [imp. & p. p. Capsized (#); p. pr. & vb. n. Capsizing.] [Cf. Sp. cabecear to nod, pitch, capuzar, chapuzar, to sink (a vessel) by the head; both fr. L. caput head.] To upset or overturn, as a vessel or other body.
But what if carrying sail capsize the boat? Byron.
Cap′size′ (kăp′sīz′), n. An upset or overturn.