Is “Imperceptibly” a Scrabble word?
Yes
IMPERCEPTIBLY
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Imperceptibly
adverb
1.Not noticeably; too small to be detected; too little to be perceived.
“No one noticed that he had moved imperceptibly backwards.”