### Core Meaning & Semantic Range
The Greek word **mykáomai**, represented by `{{G3455}}`, means to **bellow** or **roar**. Derived from a word meaning to "moo," it describes a deep, powerful sound. It is a highly specific term, appearing only **1 time** in **1 unique verse** in the entire Bible, making its single usage particularly significant.
### Biblical Occurrences & Contextual Analysis
The sole appearance of `{{G3455}}` is in [[Revelation 10:3]], during a dramatic apocalyptic vision. A mighty angel is described as having "cried with a loud voice, as when a lion **roareth**." This act of roaring is not merely a sound but a powerful proclamation that elicits a direct response from the heavens, as "seven thunders uttered their voices" immediately after. The verse pairs the action of roaring `{{G3455}}` with crying out `{{G2896}}` and a loud `{{G3173}}` voice `{{G5456}}`, emphasizing the immense authority and power behind the angel's message.
### Related Words & Concepts
Several related words provide context for the power and nature of this sound:
* `{{G3023}}` **léōn** (a "lion"): This word is directly linked to `{{G3455}}` in its only scriptural use [[Revelation 10:3]]. The lion is a symbol of both messianic authority, as with the "Lion of the tribe of Juda" [[Revelation 5:5]], and of a fearsome adversary [[1 Peter 5:8]].
* `{{G2896}}` **krázō** (to "croak" (as a raven) or scream, i.e. to call aloud): This word is used in parallel with `{{G3455}}` in [[Revelation 10:3]]. It often describes an urgent or desperate cry, such as the souls under the altar calling for judgment [[Revelation 6:10]] or believers calling to God as "Abba, Father" [[Romans 8:15]].
* `{{G1027}}` **brontḗ** (thunder): This is the direct result of the angel's roar in [[Revelation 10:3]]. Thunder is consistently associated with the awesome power and presence of God's throne in heaven ([[Revelation 4:5]], [[Revelation 11:19]]).
### Theological Significance
The theological weight of `{{G3455}}` is concentrated in its singular, powerful context.
* **Divine Authority:** The act of roaring like a lion `{{G3023}}` is a display of ultimate power and authority. The sound `{{G3455}}` is not one of simple speech but a divine bellow that commands the attention of creation and precedes a significant heavenly event.
* **Initiating Revelation:** The roar serves as a catalyst. It is the action that causes the seven thunders `{{G1027}}` to utter `{{G2980}}` their own voices [[Revelation 10:3-4]]. This positions the roar as the trigger for a divine message, one so profound it had to be sealed.
* **Apocalyptic Proclamation:** The use of `{{G3455}}` instead of a more common word for speaking, like `{{G2980}}`, signifies the unique and overwhelming nature of the angel's cry. It is a sound befitting the gravity of the end times, conveying a message with the force of a lion's roar.
### Summary
In summary, `{{G3455}}` is a rare verb that carries immense theological force in its single appearance. Used exclusively in [[Revelation 10:3]], it describes a sound of supreme authority and power, likened to the roar of a lion. It functions as the trigger for a heavenly response from the seven thunders, underscoring its role as a key element in the unfolding of apocalyptic events. The word demonstrates how a specific, powerful term can define the tone and significance of a pivotal moment in scripture.