Bible Dictionaries
Surely

Vine's Expository Dictionary of NT Words

* Notes: (1) In the AV of Matthew 26:73; Mark 14:70; John 17:8 , alethos, "truly," is rendered "surely" (RV, "of a truth"); so pantos, "at all events, altogether," in Luke 4:23 (RV, "doubtless"), and nai, "yea," in Revelation 22:20 (RV, "yea"). (2) In Hebrews 6:14 , "surely" represents the phrase ei men (so the best texts; some have e men). (3) For Luke 1:1 , AV, see BELIEVE , C, Note (4). (4) For "surely" in 2 Peter 2:12 , RV, see CORRUPT , A, No. 2 (b).

Bibliography Information
Vines, W. E., M. A. Entry for 'Surely'. Vine's Expository Dictionary of NT Words. https://www.studylight.org/​dictionaries/​eng/​ved/​s/surely.html. 1940.