名词

1. 害虫；害兽
Pests are insects or small animals which damage crops or food supplies.

2. 讨厌鬼（尤指儿童）
You can describe someone, especially a child, as a pest if they keep bothering you.

1. any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.

e.g. he sprayed the garden to get rid of pests
many pests have developed resistance to the common pesticides

2. a persistently annoying person

Synonym: blightercusspesterergadfly

3. any epidemic disease with a high death rate

Synonym: plaguepestilence

4. a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal

Synonym: plaguepestilencepestis