Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
greyish is an adjective meaning "of an achromatic color of any lightness intermediate between the extremes of white and black". It carries one recorded sense.
of an achromatic color of any lightness intermediate between the extremes of white and black
“the little grey cells”
“gray flannel suit”
“a man with greyish hair”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for greyish come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.