rust

C2 Topic:Health & Medicine

US /ɹʌst/ See IPA manual

Freq #11954

Meanings

1

noun
a plant disease that produces a reddish-brown discoloration of leaves and stems

Caused by various rust fungi.
2

noun
The deteriorated state of iron or steel as a result of moisture and oxidation; it consists mostly of iron(III) oxide (ferric oxide) and iron(II) oxide (ferrous oxide).

The rust on my bicycle chain made cycling to work very dangerous.
3

noun
A similar substance based on another metal.

Copper rust.
4

verb
To oxidize, especially of iron or steel.

The patio furniture had rusted in the wind-driven spray.

Verb forms

Verb forms are not available for this word yet.

Thesaurus

Synonyms

corrodeoxidiseoxidize

Word family

Derived forms anti-rustantirustderustnonrustingrust-beltrust-bucketrust-freerustabilityrustablerustbeltrustbucketrustful

Related forms aeciosporeferruginoushematiterouillerubiginousverdigris

Appears in

Phrases (2)

See all

rust fungi
fungi that cause rust diseases in plants

Noun + noun
rust mite
a plant-feeding mite that causes reddish-brown discoloration

Noun + noun

Proverbs (2)

See all

Etymology

From Middle English rust, rost, roust, from Old English rust, rūst (“rust”), from Proto-West Germanic *rust, from Proto-Germanic *rustaz (“rust”), from Proto-Indo-European *rudʰso- (“red”), from Proto-Indo-European *h₁rewdʰ- (“red”). Cognate with Scots roust (“rust”), Saterland Frisian rust (“rust”), West Frisian roast (“rust”), Dutch roest (“rust”), German Rost (“rust”), Danish rust (“rust”), Swedish rost (“rust”), Norwegian rust, ryst (“rust”), Finnish ruoste, Estonian rooste. Related to red.

Topics

Health & Medicine

External links

# rust

**Type:** Word
**Level:** C2
**Part of speech:** noun, verb
**IPA (US):** /ɹʌst/
**Frequency rank:** 11954

## Meanings
1. a plant disease that produces a reddish-brown discoloration of leaves and stems
2. The deteriorated state of iron or steel as a result of moisture and oxidation; it consists mostly of iron(III) oxide (ferric oxide) and iron(II) oxide (ferrous oxide).
3. A similar substance based on another metal.
4. To oxidize, especially of iron or steel.

## Examples
- Caused by various rust fungi.
- The rust on my bicycle chain made cycling to work very dangerous.
- Copper rust.
- The patio furniture had rusted in the wind-driven spray.

## Synonyms
- corrode
- oxidise
- oxidize

## Derived Forms
- anti-rust
- antirust
- derust
- nonrusting
- rust-belt
- rust-bucket
- rust-free
- rustability
- rustable
- rustbelt
- rustbucket
- rustful

## Related Forms
- aeciospore
- ferruginous
- hematite
- rouille
- rubiginous
- verdigris

## Etymology
From Middle English rust, rost, roust, from Old English rust, rūst (“rust”), from Proto-West Germanic *rust, from Proto-Germanic *rustaz (“rust”), from Proto-Indo-European *rudʰso- (“red”), from Proto-Indo-European *h₁rewdʰ- (“red”). Cognate with Scots roust (“rust”), Saterland Frisian rust (“rust”), West Frisian roast (“rust”), Dutch roest (“rust”), German Rost (“rust”), Danish rust (“rust”), Swedish rost (“rust”), Norwegian rust, ryst (“rust”), Finnish ruoste, Estonian rooste. Related to red.

## Topics
- Health & Medicine

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