1) Dismally 2) Greyly 3) Having a gray appearance 4) Having a grey appearance 5) In a drab manner 6) In a dull manner Found on https://www.crosswordclues.com/clue/grayly
greylyadverb having a grey appearance; `lonely creeks are opal in the dawn, sword-blue in the sun, greyly silver under misty moons` Found on https://www.encyclo.co.uk/local/20974