The term "re-strainer" refers to a device or tool used to hold back or restrict movement or flow. However, there are several alternative synonyms that convey the same meaning. One possible synonym for re-strainer is "choke," which refers to a device used to limit the airflow or reduce the output of a machine. Another word that can be used is "constrictor," which refers to a tool that tightens around an object or restricts its movement. Other possible synonyms for re-strainer include "limiter," "regulator," and "restrictor," all of which indicate a tool or device that restricts or limits movement, flow, or other object properties.