Summary
Quick facts
- Strong’s Number
- G2447
- Original Word
- ἰός
- Transliteration
- iós
- Pronunciation
- ee-os'
- Part of Speech
- noun
- Root / Etymology
- perhaps from (to go) or (to send);
- Frequency
- 3×
- Gematria
- 280
Where it appears
Loading distribution…
Definition
Strong 1890 rust (as if emitted by metals); also venom (as emitted by serpents)
poisonrust
perhaps from (to go) or (to send);

Commentary
Contributors: · · · ·
Introduction
Understanding Greek words is crucial for accurate interpretation of biblical texts, particularly in the New Testament. The Greek word ἰός (ios), meaning "poison" or "rust," appears in several New Testament contexts. It conveys both literal and metaphorical meanings, often representing moral corruption, decay, or destructive elements. This word helps readers grasp the imagery and symbolism used by the biblical authors to convey deeper spiritual truths and ethical teachings.
Key Information
Primary Meanings
Similar Words: φάρμακον (pharmakon) [FAR-ma-kon], meaning "drug" or "poison," is another noun related to toxic substances. While ἰός refers more broadly to venom or rust, φάρμακον often emphasizes the medicinal or harmful effects of a substance.
Further Insights: ἰός is a masculine noun following the third declension pattern in Koine Greek. Understanding its declension is essential for proper interpretation in different contexts. Here is the declension of ἰός:
Click here for a beginners guide to reading Greek.
Lexicon Insights
BDAG: Defines ἰός as "poison" or "rust," with examples of its usage referring to snake venom or the corrosive effects of rust on metals. It highlights its metaphorical use to describe moral corruption or evil speech in biblical texts.
Thayers: Elaborates on ἰός as a term for "venom" and "rust." Thayer's lexicon discusses the word's metaphorical significance in describing human sinfulness, moral decay, and the power of words to harm or corrupt.
Get Your Certificate
Give a gift of $50 or more and receive a certificate, mailed to your door.
Vines: Focuses on the dual meaning of ἰός as "poison" and "rust." Vines notes that in the New Testament, the word is often used metaphorically to depict the decay of the soul or society due to sin and corruption.
LSJ: Provides a broader classical context for ἰός, including references to venom and rust in ancient literature. It discusses the term's use in describing poisons in nature and its broader metaphorical applications in Greek rhetoric and philosophy.
Strong's Exhaustive Concordance: Lists ἰός (G2447) as referring to both "poison" and "rust." It provides cross-references to its appearances in the New Testament, highlighting its figurative use to describe destructive speech and moral decay.
Related Scripture References
Classical Usage
Summary of ἰός (G2447)
The Greek word ἰός (ios) serves as a potent metaphor in biblical literature, representing both literal poison and figurative corruption. It captures the destructive power of words and actions, highlighting the biblical theme of moral integrity versus decay. Whether describing the venom of a snake or the rust that corrodes metal, ἰός is a vivid image that communicates the corrosive effects of sin and falsehood. Understanding this word enriches our comprehension of New Testament warnings against spiritual and moral corruption.
Did You Know?
Understanding ἰός provides a clearer insight into biblical teachings on the consequences of moral decay and the importance of maintaining a life free from corruption.