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