bladder

Etymology

From Middle English bladdre, bleddre, bladder, bledder, from Old English blæddre, a variant of blǣdre, blēdre (“blister, bladder”), from Proto-Germanic *blēdrǭ, *bladrǭ (“blister, bladder”); akin to Old High German platara (German Blatter) and Old Norse blaðra (Danish blære), (Norwegian blære).

noun

1. (zoology) A flexible sac that can expand and contract and that holds liquids or gases.
2. (anatomy) Specifically, the urinary bladder.
3. (botany) A hollow, inflatable organ of a plant.
4. The inflatable bag inside various balls used in sports, such as footballs and rugby balls.
5. A sealed plastic bag that contains wine and is usually packaged in a cask.
6. (figurative) Anything inflated, empty, or unsound.
   to swim with bladders of philosophy 1711, Anthony Ashley-Cooper, 3rd Earl of Shaftesbury, “Sensus Communis”, in Characteristicks of Men, Manners, Opinions, Times

verb

1. To swell out like a bladder with air; to inflate.
   bladder'd up with pride of his own mcrit 1610, Giles Fletcher, Christ's Victorie and Triumph, in Heaven, in Earth, over and after Death
2. (transitive) To store or put up in bladders.
   bladdered lard