knacker
verb (British English, slang)- knacker somebody
to make somebody very tired 使筋疲力尽；使疲惫不堪 - knacker somebody/something
to injure somebody or damage something 使受伤；破坏；损害 I knackered my ankle playing football. 我踢足球时扭伤了脚踝。
Word Originlate 16th cent. (originally denoting a harness-maker, then a slaughterer of horses): possibly from obsolete knack ‘trinket’. The word also had the sense ‘old worn-out horse’ (late 18th cent.). It is unclear whether the verb represents a figurative use of “slaughter”, or of “castrate”.