### Core Meaning & Semantic Range
The Greek word **phylakízō**, represented by `{{G5439}}`, is a specific term used to **imprison** or **incarcerate**. It appears **1 time** across **1 unique verse** in the Bible. Its definition, derived from φύλαξ, points directly to the act of confining someone.
### Biblical Occurrences & Contextual Analysis
The sole use of `{{G5439}}` is found in Paul's testimony in Jerusalem. Recounting his former life of persecuting the church, he confesses to the Lord, "I **imprisoned** and beat in every synagogue them that believed on thee" [[Acts 22:19]]. In this context, the word describes a hostile action taken against early Christians, linking the act of imprisonment directly to an opposition to faith in Jesus.
### Related Words & Concepts
Several related words found in its only biblical context help clarify its meaning and application:
* `{{G1194}}` **dérō** (a primary verb; properly, to flay, i.e. (by implication) to scourge, or (by analogy) to thrash:--beat, smite): This word is paired with `{{G5439}}` in Paul's confession, indicating that imprisonment was accompanied by physical violence [[Acts 22:19]]. It is used elsewhere to describe punishment, such as when believers are warned they will be **beaten** in the synagogues [[Mark 13:9]].
* `{{G2252}}` **ḗmēn** (a prolonged form of ἦν; I was:--be, was. (Sometimes unexpressed)): This verb establishes the action of imprisoning as a past activity. Paul states "I **was** imprisoning" (rendered as "I imprisoned" in [[Acts 22:19]]), framing it as part of his former life. The word is often used to describe a past state, such as Jesus's declaration, "I **was** with them" [[John 17:12]].
### Theological Significance
The theological weight of `{{G5439}}` is concentrated in its single appearance:
* **A Tool of Persecution:** The word's usage in [[Acts 22:19]] specifically defines imprisonment as an act of religious persecution. It is presented as a hostile action against "them that believed on thee," carried out within the synagogue system.
* **A Marker of Testimony:** The act of having **imprisoned** believers becomes a critical part of Paul's testimony. It serves as a stark contrast to his converted state, emphasizing the depth of his past opposition to the very faith he now proclaims.
### Summary
In summary, `{{G5439}}` is a highly specific term for the act of imprisonment. Though it appears only once, its context in [[Acts 22:19]] gives it significant weight, portraying incarceration as a method of persecuting the early church. It illustrates how a simple action can become a key element in a powerful testimony of repentance and conversion, marking the boundary between a life of opposition and one of faith.