Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
well-wisher is a noun meaning "someone who shares your feelings or opinions and hopes that you will be successful". It carries one recorded sense.
someone who shares your feelings or opinions and hopes that you will be successful
Definitions, synonyms and semantic relations for well-wisher come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.