the.com/astringency

means A sharp, dry, puckering sharpness in taste or touch, caused by substances that pull tight on living tissue.

from From Latin astringere, 'to bind tight' — ad- ('to') plus stringere ('to draw tight, bind, or press together'), the same root that gives us 'strict' and 'stringent.' Latin speakers used it for anything that drew things together or constricted them, and the word kept that sense of tightening as it passed into English, where it settled onto the specific sensation of tannins clamping down on the proteins in your mouth.