Akribos (ἀκριβῶς) means with exact precision, accuracy, and careful attention to detail. It describes both the precision of knowledge (knowing something thoroughly) and the precision of behavior (living according to exact standards). The related adjective is akribes and the noun akribeia (exactness, strict observance).
Luke 1:3 uses the related verb to describe his investigative method: 'I too decided, after investigating everything carefully from the very first, to write an orderly account for you' — the foundation of Luke's historical reliability claim. Acts 18:25-26 uses it of Apollos who taught 'accurately (akribos) the things concerning Jesus' — though needing supplement about the full gospel. Ephesians 5:15: 'Look carefully then how you walk' — the Christian life requires precise attention, not carelessness. The Pharisees' stricter (akribestatos) sect (Acts 26:5) were defined by exactness in law-keeping, though their precision was misdirected.
The precision implied in akribos sets a high standard for Christian discipleship, teaching, and inquiry. Luke's use for his investigative method grounds the Gospel in responsible historical research. The call to 'walk carefully' (Ephesians 5:15) is a call to intentional, deliberate discipleship — not accidental drifting. Truth matters; accuracy matters; careful attention to God's word and God's way is itself a form of worship.