Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
thick-skulled is an adjective meaning "(used informally) stupid". It carries one recorded sense.
(used informally) stupid
Definitions, synonyms and semantic relations for thick-skulled come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.