Strong's #3689: ontos (pronounced on'-toce)

adverb of the oblique cases of 5607; really:--certainly, clean, indeed, of a truth, verily.

Thayer's Greek Lexicon:

̓́

ontōs

1) truly, in reality, in point of fact, as opp. to what is pretended, fictitious, false, conjectural

2) that which is truly etc., that which is indeed

Part of Speech: adverb

Relation: from the oblique cases of G5607

Usage:

This word is used 10 times:

 

Mark 11:32: "that he was a prophet indeed."
Luke 23:47: "he glorified God, saying, Certainly this was a righteous man."
Luke 24:34: "The Lord is risen indeed, and hath appeared to Simon."
John 8:36: "shall make you free, ye shall be free indeed."
1 Corinthians 14:25: "is in you of a truth."
Galatians 3:21: "there had been a law given which could have given life, verily righteousness should have been"
1 Timothy 5:3: "Honor widows that are widows indeed."
1 Timothy 5:5: "Now she that is a widow indeed, and desolate, trusteth in God,"
1 Timothy 5:16: "that it may relieve them that are widows indeed."
2 Peter 2:18: "the lusts of the flesh, through much wantonness, those that were clean escaped from them who live in error."