IPA: //ˌæn.tiˈɛs.trə.dʒən//
KK: /ˌæntiˈɛstroʊdʒən/
A substance that prevents the effects of estrogens in the body.
Doctors sometimes prescribe an antiestrogen to treat certain types of breast cancer.
Antiestrogen → It is formed from "anti-" (meaning against) and "estrogen" (from Greek "oistros", meaning a gadfly or passion, and the suffix "-gen" meaning to produce). The word refers to substances that act against or inhibit the effects of estrogens in the body.
Think of 'anti-' meaning against, and 'estrogen' being a hormone that promotes certain traits. This helps you remember that antiestrogen refers to something that works against the effects of estrogen.