-er

Từ điển Oxford Advanced Learner 8th

-er [-er] BrE NAmE suffix
1. (in nouns)a person or thing that
•lover
•computer
compare ↑-ee, ↑-or
2. (in nouns)a person or thing that has the thing or quality mentioned
•three-wheeler
•foreigner
3. (in nouns)a person concerned with
•astronomer
•philosopher
4. (in nouns)a person belonging to
•New Yorker
5. (makes comparative adjectives and adverbs)
•wider
•bigger
•happier
•sooner
compare ↑-est