### Core Meaning & Semantic Range
The Greek word **sidḗreos**, represented by `{{G4603}}`, means **made of iron**. It appears **5 times** across **5 unique verses** in the Bible. This term is used to describe objects characterized by their unyielding strength, whether for ruling, for defense, or for confinement.
### Biblical Occurrences & Contextual Analysis
In scripture, `{{G4603}}` is used to illustrate concepts of absolute authority and power. It repeatedly describes the "rod of **iron**" with which the nations will be ruled ([[Revelation 19:15]], [[Revelation 12:5]]). This rule is so decisive that it is compared to the shattering of a potter's vessels [[Revelation 2:27]]. The word also denotes physical security and confinement, as with the "iron **gate**" of the prison that held Peter [[Acts 12:10]]. Finally, it conveys impenetrable defense in a context of battle, describing locust-like creatures with "breastplates of **iron**" [[Revelation 9:9]].
### Related Words & Concepts
Several related words provide context for the use of **sidḗreos**:
* `{{G4464}}` **rhábdos** (a stick or wand (as a cudgel, a cane or a baton of royalty):--rod, sceptre, staff): This word is directly modified by **sidḗreos** to form the image of the "rod of iron," a symbol of authoritative rule over the nations [[Revelation 19:15]].
* `{{G4165}}` **poimaínō** (to tend as a shepherd of (figuratively, superviser):--feed (cattle), rule): This verb describes the action performed with the iron rod, highlighting that the "shepherding" of the nations in this context is one of powerful and decisive rule, not gentle guidance [[Revelation 2:27]].
* `{{G2382}}` **thṓrax** (the chest ("thorax"), i.e. (by implication) a corslet:--breast-plate): This term for armor is described as being "of iron," emphasizing the formidable and invulnerable nature of the beings described in the vision of judgment [[Revelation 9:9]].
### Theological Significance
The thematic weight of `{{G4603}}` is significant in conveying strength and finality.
* **Unyielding Authority:** The "rod of iron" symbolizes a form of rule that is absolute and will shatter opposition. This authority is received from the Father and is used to rule all nations ([[Revelation 2:27]], [[Revelation 12:5]]).
* **Impenetrable Defense:** The "breastplates of iron" worn by the locusts from the abyss signify invulnerability in battle, contributing to the terror of the judgment they execute [[Revelation 9:9]].
* **Symbol of Confinement:** The "iron gate" represents the ultimate security of a prison, an obstacle that seems insurmountable by human means but opens on its own accord in the presence of divine power [[Acts 12:10]].
### Summary
In summary, `{{G4603}}` is more than a simple descriptor of a material. It is a powerful adjective used to convey themes of strength, inflexibility, and absolute power. Whether describing a scepter of judgment, protective armor for battle, or an impassable prison gate, **sidḗreos** consistently points to a quality that is formidable and unyielding.
TRV