The phrase "drew tight" suggests a sense of tension, tautness, or restriction. Its antonyms, on the other hand, evoke a feeling of looseness, slackness, and ease. Some possible antonyms for "drew tight" are "let loose," "slackened," "relaxed," "loosened," "untied," "unbound," "released," "unclasped," "unstrapped," "unshackled," "unfettered," "unrestricted," and "unconstrained." These words can be used to describe the opposite of something that has been tightly drawn, such as a rope, a garment, a muscle, or a facial expression.