draw·string 
/ˈdrɑ:ˌstrɪŋ/ noun
plural draw·strings /ˈdrɑ:ˌstrɪŋ/ noun [count] : a string that can be pulled to close or tighten something (such as a bag or a piece of clothing)
▪ a drawstring bag ▪ drawstring pants [=pants that have a drawstring at the waist]
▪ a drawstring bag ▪ drawstring pants [=pants that have a drawstring at the waist]
