Dictionary.net

• fisk'er-i, n. (Carlyle) friskiness.--v.i. FISK (obs.), to jump about. [Prob. a freq. of A.S. fýsan, to hurry, or of fésian, to feeze; Sw. fjäska, to fidget.]

1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson