### Core Meaning & Semantic Range
The Greek word **hyakínthinos**, represented by `{{G5191}}`, is a specific adjective meaning "hyacinthine" or "jacinthine," which denotes a deep blue color. This term is exceptionally rare in scripture, appearing only **1 time** in **1 unique verse**. Its sole use is to describe a specific visual element within a prophetic vision, linking its meaning directly to the color of the jacinth stone.
### Biblical Occurrences & Contextual Analysis
The single biblical occurrence of `{{G5191}}` is found in the apocalyptic vision of [[Revelation 9:17]]. In this passage, John describes a terrifying supernatural cavalry, stating that the riders had "breastplates of fire, and of **jacinth**, and brimstone." The word provides a specific color, deep blue, to the armor of these formidable figures. This use of `{{G5191}}` contributes to a vivid and unnerving image where the colors of the riders' breastplates mirror the destructive elements of fire, smoke, and brimstone that issue from the mouths of their horses.
### Related Words & Concepts
Several related words in the immediate context of [[Revelation 9:17]] help clarify the role and meaning of **hyakínthinos**:
* `{{G2382}}` **thṓrax** (breast-plate): This is the object that `{{G5191}}` describes. The riders are equipped with a **breast-plate**, a piece of armor for the chest, signifying their martial and destructive purpose [[Revelation 9:17]].
* `{{G4447}}` **pýrinos** (of fire): This adjective is used in parallel with `{{G5191}}` to describe the breastplates, linking the deep blue of jacinth with the color of fire [[Revelation 9:17]].
* `{{G2306}}` **theiṓdēs** (brimstone): The third descriptor for the breastplates, this "sulphur-like" color connects the riders' appearance directly to themes of judgment [[Revelation 9:17]].
* `{{G4442}}` **pŷr** (fire): This element, which comes from the mouths of the horses, is also used to describe the breastplates, creating a direct visual link between the riders' armor and their destructive power [[Revelation 9:17]].
### Theological Significance
While appearing only once, the theological context of `{{G5191}}` is significant due to its associations.
* **Imagery of Judgment:** The word **jacinth** is part of a trio of descriptors—fire, jacinth, and brimstone—that are strongly associated with divine judgment and destruction throughout the book of Revelation.
* **Apocalyptic Vision:** As a descriptor, `{{G5191}}` contributes to the unique and terrifying nature of the vision in [[Revelation 9:17]], painting a picture of a supernatural army that is unlike any earthly force.
* **Symbolic Armor:** The term is used to describe a **breast-plate** `{{G2382}}`, connecting the deep blue color to the defensive and offensive nature of the riders in this prophetic judgment.
### Summary
In summary, `{{G5191}}` is a highly specific term for the color "deep blue," or **jacinth**. Its importance is derived entirely from its single, powerful use in [[Revelation 9:17]]. Paired with descriptions of fire and brimstone, it does more than add color; it contributes to the fearsome and judgmental imagery of the apocalyptic vision, tying this rare word to a scene of divine wrath.
TRV