surely

[shoo r-lee, shur-] /ˈʃʊər li, ˈʃɜr-/
adverb
1.
firmly; unerringly; without missing, slipping, etc.
2.
undoubtedly, assuredly, or certainly:
The results are surely encouraging.
3.
(in emphatic utterances that are not necessarily sustained by fact) assuredly:
Surely you are mistaken.
4.
inevitably or without fail:
Slowly but surely the end approached.
5.
yes, indeed:
Surely, I'll go with you!
Origin
1300-50; Middle English surliche. See sure, -ly
Usage note
2. See sure.
Examples from the web for surely
  • The myth was that if you ate enough, you'd surely return.
  • As surely as the gardener's focus shifts from fall to winter, it shifts from outdoors to indoors.
  • Then, slowly but surely, the rest of their plans took shape.
  • The divine power moves with difficulty, but at the same time surely.
  • But if the past is any guide, this prediction will almost surely be wrong.
  • surely the artificial fractures won't play a role in seismic activity.
  • surely those stakes warrant the humble, humanistic study of what essentially lies beyond reason's authority.
  • surely some of those students were great in one or more important ways.
  • Anyone who has watched toddlers playing and squabbling has surely reached the same conclusion about humans.
  • Those of us in higher education surely know that from our own experiences.
British Dictionary definitions for surely

surely

/ˈʃʊəlɪ; ˈʃɔː-/
adverb
1.
without doubt; assuredly: things could surely not have been worse
2.
without fail; inexorably (esp in the phrase slowly but surely)
3.
(sentence modifier) am I not right in thinking that?; I am sure that: surely you don't mean it?
4.
(rare) in a sure manner
5.
(archaic) safely; securely
6.
(sentence substitute) (mainly US & Canadian) willingly; of course; yes
Word Origin and History for surely
adv.

14c., from sure (adj.) + -ly (2).