Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
grayly is an adverb meaning "having a grey appearance". It carries one recorded sense.
having a grey appearance
“lonely creeks are opal in the dawn, sword-blue in the sun, greyly silver under misty moons”
Definitions, synonyms and semantic relations for grayly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.