### Core Meaning & Semantic Range
The Greek word **pseudṓnymos**, represented by `{{G5581}}`, is defined as "untruly named" or **falsely so called**. It is formed from the words ψευδής (pseudḗs) and ὄνομα (ónoma). This specific term is exceptionally rare, appearing only **1 time** in **1 unique verse** in the entire Bible, highlighting its very particular application.
### Biblical Occurrences & Contextual Analysis
The single appearance of `{{G5581}}` is found in the charge to Timothy. In [[1 Timothy 6:20]], he is instructed, "O Timothy, keep that which is committed to thy trust, avoiding profane and vain babblings, and oppositions of science **falsely so called**". Here, the term is used to modify "science" or knowledge `{{G1108}}`, identifying it as a counterfeit system of thought that presents itself as truth but is fundamentally deceptive and must be turned away from.
### Related Words & Concepts
Several related words from its context clarify the nature of this warning:
* `{{G1108}}` **gnōsis** (knowledge, science): This is the very concept being mislabeled. While true **knowledge** of God is celebrated [[Romans 11:33]], the term is also used here to describe a set of theories that are in opposition to the truth.
* `{{G477}}` **antíthesis** (opposition): This word defines the core nature of the false knowledge. It describes a "conflict of theories" that directly challenge the sacred trust Timothy is meant to guard [[1 Timothy 6:20]].
* `{{G1624}}` **ektrépō** (to deflect, i.e. turn away): This is the prescribed action in response to these false teachings. Believers are commanded to **avoid** or turn aside from them, just as some had already turned aside to fables [[2 Timothy 4:4]].
### Theological Significance
The theological weight of `{{G5581}}` centers on the vital importance of doctrinal purity and discernment.
* **Guarding the Sacred Trust:** The term appears within a command to **keep** `{{G5442}}` "that which is committed to thy trust" `{{G3872}}`. This "sacred trust" is presented as something precious that must be protected from corrupting influences ([[1 Timothy 6:20]], [[2 Timothy 1:14]]).
* **Identifying Counterfeit Knowledge:** The word serves as a critical label to distinguish between true, godly **knowledge** [[Philippians 3:8]] and theories that are merely "untruly named." It is a warning against ideas that oppose the knowledge of God [[2 Corinthians 10:5]].
* **Avoiding Profane Discussion:** This false knowledge is grouped with "**profane** `{{G952}}` and **vain babblings** `{{G2757}}`," which are to be shunned because they "increase unto more ungodliness" [[2 Timothy 2:16]].
### Summary
In summary, `{{G5581}}` is a precise and potent term used to unmask intellectual and spiritual deception. Though used only once, **pseudṓnymos** provides a permanent biblical warning to be on guard against teachings that claim the authority of "knowledge" but are, in reality, hollow and contradictory to the faith. Its placement in [[1 Timothy 6:20]] emphasizes the duty of every believer to discern truth from error and to protect the sacred deposit of the gospel.