portent
n.
1560s, from Middle French portente, from Latin portentum "a sign, token, omen; monster, monstrosity," noun use of neuter of portentus, past participle of portendre (see portend).
〔蒋〕[tend(tends，tent)=stretch伸，tent=tend;出现在…之前的情况或事物] 预兆，不详之兆