Merriam-Webster Collegiate Dictionary - furiously

 adverb see furious FURL  I. verb  Etymology: Anglo-French ferlier to fasten, from fer, ferm tight (from Latin firmus firm) + lier to tie, from Latin ligare — more at ligature  Date: 1556  transitive verb to wrap or roll (as a sail or a flag) close to or around something  intransitive verb to curl or fold as in being ~ed  II. noun  Date: 1643  1. a ~ed coil  2. the act of ~ing