different between slackly vs blackly

English

Etymology

slack +? -ly

Adverb

slackly (comparative more slackly, superlative most slackly)

1. In a slack manner.

   He shook my hand slackly. It was like shaking a dead fish.

   The flags hung slackly, there wasn't a breeze in the sky.

English

Etymology

From black +? -ly.

Pronunciation

• IPA^(key): /?blækli/

Adverb

blackly (comparative more blackly, superlative most blackly)

1. With a black appearance.
   • 2011, T. J. Forrester, Miracles, Inc. (page 37)

     Here and there, sun glanced off water, and slick surfaces shone blackly orange in the morning light.

2. Darkly or gloomily.
   • 1997, Joan Gordon, Veronica Hollinger, Blood Read: The Vampire as Metaphor in Contemporary Culture

     One of the most interesting — and confusing — vampire stories to deal with questions of morality in the postmodern context is the blackly comic film Vampire's Kiss (dir. Robert Bierman, 1988), which tells of a despicable yuppie named Peter Low — played in completely over-the-top fashion by Nicholas Cage — and his encounter at a singles bar with the vampire Rachel.