[in sing.]the sound of a bell, especially when rung solemnly for a death or funeral 钟声;(尤指)丧钟声 ■(figurative)used with reference to an announcement, event, or sound that is regarded as a solemn warning of the end of something (喻)丧钟,警钟 the decision will probably toll the knell for the facility. 该决议可能会为这项服务敲响丧钟。
verb
[no obj.](of a bell) ring solemnly, especially for a death or funeral (铃,尤指丧钟)敲响 ■[with obj.]proclaim (something) by or as if by a knell 发出丧钟般的声音宣告(某事)
语源
Old English cnyll (noun), cnyllan (verb), of West Germanic origin; related to Dutch knal (noun), knallen (verb) 'bang, pop, crack'. The current spelling (dating from the 16th cent.) is perhaps influenced by bell