bladder

noun

1. A flexible sac that can expand and contract and that holds liquids or gases.
2. Specifically, the urinary bladder.
3. 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 container in the form of a flexible bag.

   “a fuel bladder”

6. A container in the form of a flexible bag.
7. (figuratively)Anything inflated, empty, or unsound.

   “to swim with bladders of philosophy”

verb

1. To swell out like a bladder with air; to inflate.

   “bladder'd up with pride of his own mcrit”

2. (transitive)To store or put up in bladders.

   “bladdered lard”