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constriction (n.)

"act of constricting; state of being constricted," c. 1400, constriccioun, from Latin constrictionem (nominative constrictio) "a binding or drawing together," noun of action from past-participle stem of constringere "to bind together, tie tightly, fetter, shackle, chain," from assimilated form of com "with, together" (see con-) + stringere "to draw tight" (see strain (v.)). From 1640s as "that which constricts."