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to turn over; to cause to overturn, especially a boat or other vessel
If the canoe is overloaded, it may capsizes.
If the canoe is overloaded, it may overturn.
The sudden gust capsizes the small sailboat.
The sudden gust overturns the small sailboat.
Used for vessels; also metaphorically for projects or plans that fail dramatically.
Use capsizes for present‑tense third‑person singular, capsized for past tense, and capsizing for the progressive form.
From Middle English 'capsizen', borrowed from Dutch 'kapseizen' (kap ‘head’ + zeilen ‘to sail’), originally meaning ‘to turn a ship head‑first.’
Third‑person singular adds -s (capsizes). Past tense is capsized; present participle capsizing.