most importantly
What is the opposite of most importantly? Here is what we hold, with its meaning and related words.
Adverb — Used to introduce the point the speaker considers the single most significant, usually at the end of a list.
How to use most importantly
The word patterns that sound natural to a native speaker.
Acceptable in all registers. A minority of style guides prefer 'most important' as the sentence adverbial, but 'most importantly' is now standard.