constrain

verb

Etymology: Etymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin cōn- Proto-Indo-European *strengʰ-der. Proto-Indo-European *streyg-der. Latin stringō Latin cōnstringōder. Old French constreindrebor. Middle English constreinen English constrain From Middle English constreinen, from Old French constreindre, from Latin cōnstringō, from cōn- (“with, together”) + stringō (“to draw, bind or tie tight”), ultimately from Proto-Indo-European *streyg- (“to stroke, to shear, stiff”).

1. To force physically, by strong persuasion or pressuring; to compel; to oblige.
2. To keep within close bounds; to confine.

   “But it's not just Castlefield Corridor capacity that constrains services. All the junctions on the lines feeding into the corridor are flat, so they create conflict points as trains pass.”

3. To reduce a result in response to limited resources.