D defs.my
Entry 2 senses Webster, 1913

Surely

/sho͝or'-lē/ · Sure·ly · IPA /ˈʃʊɹli/
01 adv. In a sure or certain manner; certainly; infallibly; undoubtedly; assuredly.
  1. 1.
    In a sure or certain manner; certainly; infallibly; undoubtedly; assuredly.
    “In the day that thou eatest thereof thou shalt surely die.” — Gen. ii. 17.
    “He that created something out of nothing, surely can raise great things out of small.” South.
  2. 2.
    Without danger; firmly; steadly; securely.
    “He that walketh uprightly walketh surely.” — Prov. x. 9.