tighten Antonyms

loosen slacken spread thread be against unbolt unclench unfold unlock slack release relax pouched open loose liberalize inflection free unmuzzle unpinion uncreased open out become worse cool off devaluate let go unzipping tantalise doubles liberalise cool down liberalisation calm down wire untruss untie unscrew flexure flax damage counteract counter cord controvert contradict contest confront combat check challenge