Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
splinterproof is an adjective meaning "resistant to shattering or splintering". It carries one recorded sense.
resistant to shattering or splintering
“shatterproof automobile windows”
Definitions, synonyms and semantic relations for splinterproof come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.