1.begin...with 2.foronething...(foranother) 3.firstofall 4.tobeginwith 5.
imprimis 6.inthefirstinstance 7.
firstly 8.ofallthings 9.aboveall 10.tostartwith 11.
primarily 12.
threshold 13.atafirstbrush 14.firstandforemost 15.thefirstthing 16.inthebeginning