tighten in Wingdings is ⧫︎♓︎♑︎♒︎⧫︎♏︎■︎

To draw tighter; to straiten; to make more close in any manner.Just where I please, with tightened rein I'll urge thee round thedusty plain. Fawkes.Tightening pulley (Mach.), a pulley which rests, or is forced,against a driving belt to tighten it.