constringe

verb

1. (ambitransitive)To constrict; to tighten.

   “The emulgent draw this superfluous moisture from the blood; the two ureters convey it to the bladder, which, by reason of his site in the lower belly, is apt to receive it, having two parts, neck and bottom: the bottom holds the water, the neck is constringed with a muscle, which, as a porter, keeps the water running out against our will.”