AskEraser  |  Settings
Ask.com   
 
first·ly (fûrst́lē)

adverb 

In the first place; to begin with.

usage note

Usage Note: It is well established that either first or firstly can be used to begin an enumeration: Our objectives are, firstfirstlyto recover from last year's slump. Any succeeding items should be introduced by words parallel to the form that is chosen, as in first . . . second . . . third or firstly . . . secondly . . . thirdly.