English
abyssally
From abyssal + -ly.
Formed from abyssal + -ly
Ancient Greek βυθός ‘depth’
Ancient Greek ἄβῠσσος ‘bottomless pit’
Latin abyssus ‘abyss’
Medieval Latin abyssalis ‘Of, pertaining to or resembling an abyss’
English abyssal
Today it means
adv To an abyssal, unfathomable extent.
Language periods are conventional ranges, not dates for this word.
Etymograph / abyssally