ἀκέραιος

simple, unsophisticated, innocent

Definition

The adjective ἀκέραιος literally means 'unmixed' or 'unadulterated,' describing something in its pure, original state. In the New Testament, it carries the moral sense of being 'innocent,' 'pure,' or 'blameless,' free from corrupting influences. In Matthew 10:16, Jesus instructs his disciples to be 'innocent as doves' (ἀκέραιος), highlighting a quality of guileless simplicity in the midst of a hostile world. In Romans 16:19 and Philippians 2:15, the term describes believers who are to be 'pure' or 'blameless,' uncorrupted by the evil around them, shining as lights.

Biblical Usage

This word is used three times, always in ethical exhortations. It appears in Jesus's missionary instructions (Matthew 10:16), Paul's warning to the Roman church (Romans 16:19), and his description of the Philippian church's witness (Philippians 2:15). In each case, it describes the ideal moral character of God's people—characterized by sincere, undivided loyalty to God and freedom from moral compromise—while they exist in a crooked and corrupt generation.

Etymology

Derived from the alpha-privative ἀ- (meaning 'not' or 'without') and a root related to mixing or blending (κεράννυμι, 'to mix'). Its literal sense is 'unmixed,' like wine or metal without alloy. This concrete meaning developed into the metaphorical sense of moral purity, integrity, and simplicity—someone whose character is not diluted or corrupted by foreign elements.

Semantic Range

This word is key for understanding the biblical call to holiness and distinctiveness. It portrays Christian integrity not as naive ignorance but as a cultivated, undivided purity of heart and purpose in a fallen world. It enriches the reading of passages like Philippians 2:15 by emphasizing that believers are to be morally 'unmixed' from the surrounding darkness, which is central to their identity and witness as children of God.

In a Greco-Roman context, the idea of being 'unmixed' had strong ethical connotations, valued in philosophical discussions about virtue and a life of integrity. The call to be ἀκέραιος would resonate as a call to a consistent, uncorrupted moral life, contrasting sharply with the duplicity and moral compromise common in society.

ἁγνός (hagnos, G53) — emphasizes ritual or moral purity, often in a consecrated sense. ἄμωμος (amōmos, G299) — focuses on being without blemish or blame, often in a sacrificial context. εἰλικρινής (eilikrinēs, G1506) — stresses sincerity and purity of motive, tested by sunlight.

Word Details

Scripture References