Hey everyone!
After getting into more extensive reading, I have noticed that many adverbs and adjective-like words have a very similar form. I think it’s best explained by example:
はっきり
くっきり
むっきり
こっそり
のっそり
しっかり
ふっくり
ゆっくり
すっくり
… And probably many more.
Do the words with this structure share some common ancestry, or are they formed following some structural approach?