infest
词根词缀：
festal adj. 节日的
fest 节日 + al …的 → 节日的
festival n. 节日
fest 节日 + ival → 节日
festive adj. 节日的
fest 节日 + ive 有…性质的 → 节日的
festivity n. 喜庆
fest 节日 + ivity …力，…性；情况，状态 → 喜庆
fester v. （指伤口）溃烂
fest 仇恨 + er 反复动作，连续动作；拟声动作 → 和伤口有仇 → 溃烂
infest v. 大批出没；扰乱
in 使… + fest 仇恨 → 结仇 →〔因结仇而〕大批出没扰乱秩序 → 大批出没；扰乱
manifest adj. 显然的
mani 手 + fest 仇恨 → 仇恨得用手打 →〔恨意〕显然的
数据来源：新东方英语词汇速记大全
相关例句：
At last, the paper also points out the enterprises 'alone price competitions will change to the competitions of stratagem alliance and industry infest chain, predicating the competition change from low level to high level.
最后指出企业间单枪匹马的价格竞争要向战略联盟间和产业群居链间竞争、服务品牌与差异化竞争转变，即从低层次的竞争向高层次上的竞争转变。
The pest is known to infest cucurbits, and Panama is a major producer and exporter of cucurbits.
这种害虫能够侵染瓜类是众所周知的，巴拿马是一个主要的瓜类生产商和出口商地方。
No one wanted to accidentally infest the world with a deadly virus!
没有人希望出现意外，用一种致命的病毒侵扰全世界！
The bacteria infest the bone marrow, lymph glands, vital organs and the central nervous system.
细菌大批出没于骨头髓，淋巴腺，重要的器官和中央的神经系统。
This articles discusses the treatment and stabilization of the weathered infest side slope in karst area of Jiu Xiang resort in Kunming, by using high-rate plants ( such as Vetiver) as plant fence.
应用（改良）香根草等高植物篱技术治理与稳固昆明九乡喀斯特（岩溶）地区石漠化病害边坡。
Several animals in sea water can infest wood.
海水中有好多动物能侵害木材。