earth ‧ ly /ˈɜːθli $ ˈɜːrθli/ BrE AmE adjective
[ Word Family: noun : ↑ earth , ↑ earthling , ↑ earthiness ; adjective : ↑ earthy , ↑ earthly ≠ ↑ unearthly , ↑ earthen ; verb : ↑ unearth ; adverb : earthward(s)]
1 . no earthly reason/use etc no reason, use etc at all:
I see no earthly reason why he shouldn’t come.
2 . [only before noun] literary connected with life on Earth rather than in heaven:
our earthly pleasures
an earthly paradise