rubber1

Origin:

mid 16th century: from the verb rub + -er¹. The original sense was 'an implement (such as a hard brush) used for rubbing and cleaning.' Because an early use of the elastic substance (previously known as caoutchouc) was to rub out pencil marks, rubber gained the sense 'eraser' in the late 18th century The sense was subsequently (mid 19th century) generalized to refer to the substance in any form or use, at first often differentiated as India rubber