Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
rock-ribbed is an adjective meaning "abounding in or bordered by rocky cliffs or scarps". It carries 2 recorded senses.
tradition-bound and obstinately opinionated
“an inflexible (or die-hard) conservative”
“rock-ribbed republican”
Definitions, synonyms and semantic relations for rock-ribbed come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.