Word: heatproof
Part of speech: Verb
Syllables: heat
proof
Definition: To make insulating and incombustible.
Morphemes:
Affix: heat
Language: en
PoS: Verb
Meaning: To excite or make hot by action or emotion; to make feverish.
Affix: -proof
Language: en
PoS: Suffix
Meaning: Used to form adjectives denoting an impervious or impenetrable quality.