means A device made of strong fabric stretched over a frame by springs, used for bouncing high into the air for sport or play.

from From Spanish 'trampolín,' a springboard or diving board, which came from Italian 'trampolino,' built on 'trampoli,' meaning stilts. The trail likely leads back to a Germanic root for 'tramp' — to stamp or tread heavily — so the word for soaring upward is, fittingly, rooted in the act of stomping down. The modern bouncing apparatus took the name in the 20th century, when the device itself was developed.