Word: spillproof
Part of speech: Adjective
Syllables: spill
proof
Definition: Resistant to being spilled.
Morphemes:
Affix: spill
Language: en
PoS: Verb
Meaning: To drop something so that it spreads out or makes a mess; to accidentally pour.
Affix: -proof
Language: en
PoS: Suffix
Meaning: Used to form adjectives denoting an impervious or impenetrable quality.