From Longman Dictionary of Contemporary Englishburn away phrasal verbBURNif something burns away or is burned away, it is destroyed by fireburn something ↔ away All her hair had been burnt away. → burn→ See Verb table
Examples from the Corpus
burn away• Normally printers of this type are classified as non-impact but this version actually deposits carbon rather than burn away a layer of silvering.• All her hair had been burnt away but for the black roots and her features hideously charred.• The stripes on ties are formed by strategically burning away the nap of the velvet. 