a small insect that lives in highly organized groups. There are many types of ant 蚂蚁 
an ants’ nest 蚁窝 an ant colony 蚁群
Oxford Collocations DictionaryAnt is used before these nouns:- colony
- mound
Word OriginOld English ǣmete of West Germanic origin; related to German Ameise.
Idioms
have ants in your pants
- (informal)
to be very excited or impatient about something and unable to stay still 焦躁不安；坐立不安