To lightly burn
[DOC] [TLE] to burn something - synonyms and related words | Macmillan ... [PAR] Comprehensive list of synonyms for to burn something, by Macmillan Dictionary 
and ... to burn something slightly so that only the edge or surface is affected... [DOC] [TLE] Another word for burn | Synonyms for burn - Thesaurus [PAR] burn synonyms: burn 1scorch singe sear 1char 1parch These verbs mean to 
injure or alter by means of intense heat or flames.