Strong's #677: aproskopos (pronounced ap-ros'-kop-os)
 from 1 (as a negative particle) and a presumed derivative of 4350; actively, inoffensive, i.e. not leading into sin; passively, faultless, i.e. not led into sin:--none (void of, without) offence.
Thayer's Greek Lexicon:
 ̓́ 
 
  aproskopos 
 
 1) having nothing to strike against, not causing to stumble
 
 1a) of a smooth road
 1b) metaphorically of not leading others to sin by one' s mode of life
 
 2) not striking against or stumbling
 
 2a) metaphorically not led into sin, blameless
 
 3) without offense, not troubled by a consciousness of sin
 
  Part of Speech: adjective
Relation: from G1 (as a negative particle) and a presumed derivative of G4350
  Citing in TDNT: 6:745, 946
 
Usage:
This word is used 3 times:
Acts 24:16: "myself, to have always a conscience  void of offense toward God, and"
1 Corinthians 10:32: " Give none offense, neither to the Jews, nor to the Gentiles, nor to the"
Philippians 1:10: "ye may be sincere and  without offense till the day of Christ;"