Definify.com
Webster 1913 Edition
Certainly
Cer′tain-ly
,adv.
Without doubt or question; unquestionably.
Webster 1828 Edition
Certainly
CERTAINLY
,adv.
1.
Without doubt or question; in truth and fact.Certainly this was a righteous man. Luke 23.
2.
Without failure.He said, I will certainly return to thee. Gen. 18.