### Core Meaning & Semantic Range
The Greek word **tetrakósioi**, represented by `{{G5071}}`, is a plural term for **four hundred**. It appears 4 times in 4 unique verses and is used to define a specific numerical quantity, typically referring to years or a number of people.
### Biblical Occurrences & Contextual Analysis
In the biblical narrative, `{{G5071}}` is used to specify significant periods of time and groups. It marks the duration of affliction for Abraham's descendants, a period of **four hundred** years that God foretold would take place in a strange land [[Acts 7:6]]. It also quantifies the number of followers who joined Theudas, noting that "about **four hundred**" men followed him before his movement was brought to nothing [[Acts 5:36]]. The number is also used as a component in larger timeframes, such as the period of the judges [[Acts 13:20]] and the time between God's covenant and the giving of the law [[Galatians 3:17]].
### Related Words & Concepts
Several related numerical words provide additional context for `{{G5071}}`:
* `{{G4004}}` **pentḗkonta** (fifty): This word for **fifty** is used in combination with `{{G5071}}` to form a more precise number, as seen in the period of the judges which lasted "four hundred and **fifty** years" [[Acts 13:20]].
* `{{G5144}}` **triákonta** (thirty): Similar to fifty, this term for **thirty** is used to specify a duration, such as the "four hundred and **thirty** years" that passed between the covenant promise and the giving of the law [[Galatians 3:17]].
* `{{G706}}` **arithmós** (a number): This word, meaning **a number**, provides context for a quantity. It is used directly alongside `{{G5071}}` when describing "a **number** of men, about four hundred" who followed Theudas [[Acts 5:36]].
### Theological Significance
The theological weight of `{{G5071}}` is derived from the contexts in which it appears. It serves to anchor theological arguments within a defined historical framework.
* **Prophetic Foreknowledge:** The period of **four hundred** years of affliction for Abraham's seed was spoken by God in advance, highlighting His sovereignty over history and the fulfillment of His word [[Acts 7:6]].
* **Covenant Timeline:** The number is used to establish a critical timeline in salvation history, marking the time between God's promise and the giving of the law to demonstrate the unchangeable nature of the covenant [[Galatians 3:17]].
* **Historical Marker:** It serves as a historical reference point to illustrate God's works, whether in recounting the duration of the judges' rule in Israel [[Acts 13:20]] or in arguments about human movements that fail without divine support [[Acts 5:36]].
### Summary
In summary, `{{G5071}}` **tetrakósioi** functions as a precise numerical designator within the New Testament. While simply meaning **four hundred**, its application is significant, marking specific durations of time tied to prophecy and covenant, and quantifying groups of people in historical accounts. Its use underscores the importance of specific timeframes and events in illustrating God's overarching plan and faithfulness throughout scripture.