(transitive) To quickly lower (the head or body), often in order to prevent it from being struck by something.
(transitive) To lower (something) into water; to thrust or plunge under liquid and suddenly withdraw.
(intransitive) To go under the surface of water and immediately reappear; to plunge one's head into water or other liquid.
(intransitive) To bow.
(figuratively, transitive) To evade doing something, especially something considered a responsibility.
(transitive) To lower the volume of (a sound) so that other sounds in the mix can be heard more clearly.
(colloquial, intransitive) To enter a place for a short moment.

A cave passage containing water with low, or no, airspace.

(countable, uncountable) An aquatic bird of the family Anatidae, having a flat bill and webbed feet.
(countable, uncountable) Specifically, an adult female duck; contrasted with drake and with duckling.
(uncountable) The flesh of a duck used as food.
(countable, uncountable) A batsman's score of zero after getting out. (Short for duck's egg.)
(countable, slang, uncountable) A playing card with the rank of two.
(countable, uncountable) A building intentionally constructed in the shape of an everyday object to which it is related.
(countable, uncountable) A marble to be shot at with another marble (the shooter) in children's games.
(US, countable, uncountable) A cairn used to mark a trail.
(countable, uncountable) One of the weights used to hold a spline in place for the purpose of drawing a curve.
(countable, dated, slang, uncountable) Synonym of lame duck (“one who cannot fulfil their contracts”).
(countable, uncountable) A long-necked medical urinal for men; a bed urinal.
(UK, countable, obsolete, slang, uncountable) A faggot; a meatball made from offal.
(US, countable, slang, uncountable) Synonym of bitch (“a man forced or coerced into a homosexual relationship, especially in prison”).

ducked

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