firstly
adverb
[ ˈfəːs(t)li ]
• used to introduce a first point or reason.
• "firstly it is wrong and secondly it is extremely difficult to implement"
Similar:
first,
first of all,
in the first place,
before anything else,
first and foremost,
essentially,
in essence,
fundamentally,
most importantly,
primarily,
principally,
predominantly,
predominately,
basically,
elementally,
above all,
especially,
particularly,
