### Core Meaning & Semantic Range
The Hebrew word **hêylêl**, represented by `{{H1966}}`, is defined as **morning-star; lucifer**, stemming from a root word suggesting brightness. It is a rare term, appearing only **1 time** in **1 unique verse** in the entire biblical text.
### Biblical Occurrences & Contextual Analysis
The singular use of `{{H1966}}` is found in a prophetic declaration of judgment in Isaiah. The passage describes a once-exalted being's dramatic demise, asking, "How art thou fallen from heaven, O **Lucifer**, son of the morning!" [[Isaiah 14:12]]. This figure is depicted as being "cut down to the ground" after having "weaken[ed] the nations," establishing a clear context of a fall from a great height and status as a result of destructive pride.
### Related Words & Concepts
Several related words in its immediate context illuminate the scene of this figure's downfall:
* `{{H5307}}` **nâphal** (to fall): This root word, meaning to fall in a variety of applications, is central to the passage. It describes the primary action taken against `{{H1966}}`, emphasizing a complete loss of position and being "fallen from heaven" [[Isaiah 14:12]].
* `{{H1438}}` **gâdaʻ** (to cut down): Defined as to fell a tree or generally destroy anything, this word conveys the violence and finality of the judgment. The figure is not just fallen, but actively "cut down to the ground" [[Isaiah 14:12]].
* `{{H2522}}` **châlash** (to weaken): This term, meaning to prostrate or overthrow, describes the prior actions of `{{H1966}}`. The reason for the fall is attributed to having used its power to "weaken the nations" [[Isaiah 14:12]].
### Theological Significance
The theological weight of `{{H1966}}` is concentrated in its single, powerful appearance.
* **The Fall from Exaltation:** The word is exclusively used for a being cast down from **heaven** `{{H8064}}`. This establishes a potent theme of a precipitous fall from a place of supreme honor and position [[Isaiah 14:12]].
* **Judgment on Pride:** The context portrays a figure whose defining action was to **weaken** `{{H2522}}` the **nations** `{{H1471}}`. The judgment is a direct response, as this being is **cut down** `{{H1438}}` and brought low to the **earth** `{{H776}}`.
* **Contrast of Light and Ruin:** The title itself, "morning-star," is associated with brightness and the **dawn** `{{H7837}}`. This creates a stark contrast with the fate of being "fallen," illustrating the principle of a brilliant but proud entity brought to complete ruin.
### Summary
In summary, `{{H1966}}` is a highly specific term whose meaning is entirely shaped by its sole context in scripture. While its base definition points to brightness as the "morning-star," its biblical usage makes it a symbol of prideful exaltation that leads to a catastrophic fall. It encapsulates a profound warning about a mighty figure being overthrown and brought to nothing.