Word: lightproof
Part of speech: Adjective
Syllables: light
proof
Definition: Sealed so that no light can enter.
Morphemes:
Affix: light
Language: en
PoS: Adjective
Meaning: Having light; bright; clear; not dark or obscure.
Affix: -proof
Language: en
PoS: Suffix
Meaning: Used to form adjectives denoting an impervious or impenetrable quality.