From Longman Dictionary of Contemporary Englishwipe something ↔ away phrasal verbto stop something existing A frown quickly wiped away her smile. → wipe→ See Verb table
Examples from the Corpus
wipe away• But he wiped that concern away.• She didn't bother to wipe them away.• He wiped them away, murmuring to her to forget about it, not to worry.• I knew that the only time I had actually seen them was when I had wiped or picked away my own pus.• He tried to wipe them away on the sleeve of the plaid shirt, but it was no good.• He wiped it away with a quick, surreptitious movement.• She felt a tear on her cheek, and wiped it away with the cuff of her coat.• Then the Tin Woodman wept for several minutes, and she watched the tears carefully and wiped them away with the towel. 