Bowstring
/ˈbəʊstrɪŋ/
Definition 1 of 2
Pro Tip 1/3Archery Equipment
The term 'bowstring' is often used in archery contexts, particularly referring to the equipment. 
Make sure to wax your bowstring to maintain its durability.
Pro Tip 2/3Metaphorical Use
'Bowstring' can sometimes be used metaphorically to describe something under tension. 
Her nerves were like a bowstring, taut and ready to snap.
Pro Tip 3/3Physical Sensation
Describing the action of 'pulling a bowstring' evokes the physical sensation of tension and release. 
He felt a bowstring-like pull in his muscles during the workout.