a short piece of a cigarette, pencil, etc. that is left when the rest of it has been used （烟、铅笔等的）残余部分，残端 the small part of a ticket, cheque, etc. that you keep as a record when you have given the main part to somebody 存根；票根
Word OriginOld English stub(b) ‘stump of a tree’, of Germanic origin. The verb is first recorded (late Middle English) in the sense ‘to pull a plant up by the roots’; the current verb sense (mid 19th cent.) was originally a US usage.