きれいさっぱり· also キレイさっぱり
once and for all; completely; spotlessly
Also written 奇麗さっぱり
Adverb, Adverb (-to), Suru verb, Na-adjective
Adverb, Adverb (-to), Suru verb
番号ばんごうを奇麗きれいさっぱり忘わすれてしまった。
I completely forgot the number.