Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
wafer-thin is an adjective and adverb meaning "very thin". It carries 2 recorded senses.
very thin
“it was cut wafer-thin”
Definitions, synonyms and semantic relations for wafer-thin come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.