Sickerly

Origin

From ; equivalent to en + -sicker + ly.

Full definition of sickerly

Adverb

1. (obsolete, outside, dialects) Certainly.
• 1614, William Browne, The Shepheards Pipe, My Lord sickerly,
  Quoth he, faine would I your pleasure fulfill.
• 1634, Richard Brome, The Late Lancashire Witches, Awa awaw, sayn yeou this sickerly, or done you but jaum me?
• 1742, Robert Forbes, Ajax His Speech to the Grecian Knabs, My gentle bleed...Right sickerly does plead.