stub
noun [ C ] uk/stʌb/ us/stʌb/
残余部分，残端;（尤指）烟蒂，存根，票根
the short part of something that is left after the main part has been used, especially a cigarette after it has been smoked or one of the small pieces of paper left in a book from which cheques or tickets have been torn
Synonym: counterfoil
stub
verb uk/stʌb/ us/stʌb/
stub your toe 不小心把脚趾碰伤
to hurt your toe by hitting it against a hard object by accident
Phrasal verb
stub something out 掐灭（香烟）
to stop a cigarette from burning by pressing the burning end against a hard surface