(每日一词）infected/effective

infected  /ɪnˈfek.tɪd/ adj. 受感染的

meaning: containing bacteria or other things that can cause disease 

前缀：in-向内

词根：fect- 做

后缀：-ed 形容词后缀

补充：effective adj. 有效的, 产生预期结果的

e.g. After the operation the wound became infected. 手术后伤口受到了感染。