ἄπειρος

inexperienced, unskillful

Definition

The adjective ἄπειρος (apeiros) means 'inexperienced' or 'unskilled,' specifically in the context of lacking practical knowledge or training in a particular subject. In its sole New Testament occurrence in Hebrews 5:13, it describes someone who is 'unskilled in the word of righteousness,' referring to a spiritual novice who has not matured in understanding the deeper truths of the Christian faith. The word implies a lack of developed discernment that comes from applied practice, not merely a lack of intellectual information. It carries the sense of being a beginner or infant in a given area of practice or doctrine.

Biblical Usage

This word is used only once in the New Testament, in Hebrews 5:13. It is employed in a specific pastoral and instructional context, contrasting immature believers ('everyone who lives on milk is unskilled [ἄπειρος] in the word of righteousness') with those who are mature and can handle 'solid food.' The usage highlights a developmental stage in the Christian life, marking a deficiency that needs to be overcome through training and practice.

Etymology

Derived from the alpha-privative prefix ἀ- (a-), meaning 'not' or 'without,' combined with the root related to 'peira,' meaning 'trial,' 'experience,' or 'attempt.' Thus, its literal meaning is 'without experience' or 'untried.' This root is seen in other Greek words like ἐμπειρία (empeiria, 'experience') and πειράζω (peirazō, 'to test' or 'to tempt'), showing its connection to the concept of learning through practice or testing.

Semantic Range

This word is theologically significant as it defines a critical stage of spiritual immaturity. In Hebrews 5:13-14, it is central to the author's exhortation for believers to progress beyond elementary teachings toward maturity and discernment. Understanding ἄπειρος enriches the reading by emphasizing that Christian growth is not automatic but requires deliberate training and application of God's word to become 'skilled' in righteousness. It underscores the biblical call to move from spiritual infancy to adulthood.

In the Greco-Roman world, the term was used in educational, military, and craft contexts to denote a novice or apprentice. The author of Hebrews uses this culturally understood concept of a trainee lacking practical skill to illustrate a spiritual condition. The metaphor of 'milk' versus 'solid food' was also a common pedagogical image in ancient philosophy and rhetoric, making the analogy immediately accessible to the original audience.

νήπιος (nēpios, G3516) — emphasizes childishness or infancy, often in a moral or intellectual sense. ἄγνοια (agnoia, G52) — focuses more on ignorance or lack of knowledge itself, rather than lack of practical skill. ἀπαίδευτος (apaideutos, G521) — stresses being untaught or undisciplined.

Word Details

Scripture References