Emily Dickinson Lexicon

CA'PER, v.i. [Fr. cabrer, to prance; cabriole, a goat-leap, a caper; It. capriola, a wild goat, a caper in dancing; Sp. cabriola; L. caper, a goat. But probably caper is from the root of capio, which signifies not merely to seize, but to shoot or reach forward, or to leap and seize. Hence it is probable that this word coincides in origin with Dan. kipper, to leap, whence Eng. to skip.]

To leap; to skip or jump; to prance; to spring. – Shak.