-eer
suffix/ɪə(r)/
/ɪr/
- (in nouns) a person connected with something or doing an activity
与…有关的人；做…的人 - auctioneer
拍卖商 - mountaineer
登山运动员
- auctioneer
- (in verbs) (often disapproving) to be connected with something or doing an activity
与…有关的；做…的 - profiteer
牟取暴利 - commandeer
强占
- profiteer
Word Originfrom French -ier, from Latin -arius; verbs are often back-formations (e.g. electioneer from electioneering).