Word: stoneproof
Part of speech: Adjective
Syllables: stone
proof
Definition: Resistant to being broken by stones.
Morphemes:
Affix: stone
Language: en
PoS: Verb
Meaning: To wall with stones.
Affix: -proof
Language: en
PoS: Suffix
Meaning: Used to form adjectives denoting an impervious or impenetrable quality.