Word: rustproof
Part of speech: Verb
Syllables: rust
proof
Definition: To make resistant to rust, such as by applying a coating.
Morphemes:
Affix: rust
Language: en
PoS: Verb
Meaning: To be affected with the parasitic fungus called rust.
Affix: -proof
Language: en
PoS: Suffix
Meaning: Used to form adjectives denoting an impervious or impenetrable quality.