The act or state of binding tightly; a strict restriction, constraint, or the quality of being tightly bound.
From Latin 'astrictio', derived from 'astringere' (to bind tightly). The suffix '-tion' converts the verb into a noun describing the action or state.
Medieval medicine used 'astriction' to describe how certain medicines 'bound' the body—the same word applies to legal contracts binding you—it's a metaphor that leaped from medicine to law!
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