1. Brief Overview
The Greek preposition ἄχρι (achri), transliterated as “achri,” conveys the idea of limit or extent, typically translated as “until” or “up to.” This word is crucial for expressing the termination point of actions or conditions in temporal, spatial, and metaphorical contexts.

2. Detailed Lexical Analysis
According to BDAG, ἄχρι is used to denote the boundary up to which an action, condition, or state extends. Thayer’s Greek Lexicon aligns with this by emphasizing its usage as a marker of extremity or culmination. Vines Expository Dictionary highlights its frequent employment in conjunctions to form phrases equivalent to “even unto,” reinforcing the concept of reaching a limit. LSJ further elaborates on its spatial usage, often analogous to “as far as” in describing distances or boundaries. In the biblical context, this word appears in numerous passages, serving to demarcate temporal and spatial limits. Notable instances include Matthew 24:13, “But he that shall endure unto (ἄχρι) the end, the same shall be saved,” and Romans 5:14, “Nevertheless death reigned from Adam to (ἄχρι) Moses.”

3. Classical Greek Usage
In classical Greek literature, ἄχρι is employed similarly to its New Testament usage but often with a broader philosophical connotation:

• In Plato’s dialogues, it is used to discuss limits of knowledge and virtue.
• Aristotle uses ἄχρι in his ethical works to discuss the extent of moral obligations and virtues.
• In the histories of Thucydides, ἄχρι appears in strategic contexts, often describing the reaches of political or military influence up to certain pivotal events or locations.

4. Summary
ἄχρι (G891) functions primarily as a preposition of limit in Greek, crucial for describing the boundaries within which phenomena occur or persist, whether they be temporal, spatial, or metaphorical. Its consistent use across classical and biblical Greek texts underscores its importance in framing discussions about extents and endpoints, providing a linguistic tool for delineating scope in narrative and argumentative structures. This overview illustrates the versatility and pivotal nature of ἄχρι in conveying limits and conditions across a range of contexts.