See constrict in Webster's New World Roget's A-Z Thesaurus II
verb
To make smaller or narrower:
constringe, narrow. See tighten, wideTo reduce in size, as by drawing together:
compact1, compress, constringe, contract, shrink. See increaseTo subject to compression:
compact1, compress, constringe, squeeze. See tightenTo check the freedom and spontaneity of:
constrain, cramp2, inhibit. See free, tighten
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