The Collaborative International Dictionary
Creepingly
Creepingly \Creep"ing*ly\, adv. by creeping slowly; in the manner of a reptile; insidiously; cunningly.
How slily and creepingly did he address himself to our
first parents.
--South.
Wiktionary
creepingly
adv. By creeping, moving stealthily and slowly; insidiously; cunningly.
Usage examples of "creepingly".
For over thirty years psychohistory had developed in what might almost be considered a straight line-progress creepingly slow but moving straight ahead.
The pattern indeed had a presence, one that was creepingly unpleasant.
For over thirty years psychohistory had developed in what might almost be considered a straight line--progress creepingly slow but moving straight ahead.