elastic

• adjective

a material that is elastic can stretch and then go back to its usual shape or size:
?an elastic waistband
elastic noun [U]
elasticity noun [U]

g.Mem.

flect, flex=to bend(弯曲)

reflection n.反射；映像；沉思

flexible a.易弯曲的；灵活的

elastic a.弹性的；灵活的，顺应的