词根:coc, coct = to cook, to mature
同源词:
1. concoct(放在一起做饭、烹饪con<com(=together) + coct(=cook))
   vt.调制;调和;编造;图谋
   concoction n.混合(物),调和(物);编造
   Policemen say that speeders often concoct hilarious excuses for speeding. 警察说超速驾驶的人往往会编造一些可笑的借口。
2. precocious(早一点成熟的pre (=before) + coc(=mature,cook))
   precocity n.早熟
   She's a precocious tot. She could already read at 3.她是个早慧的孩子,三岁的时候就会识字读书了。
3. decoct
   v.煎,熬 *de(=intensive,down)
   decoction n.熬;煎制的药剂