Englishfor English speakers
Er
—
noun
(= erbium)
a trivalent metallic element of the rare earth group; occurs with yttrium
ER
—
noun
(= emergency room)
a room in a hospital or clinic staffed and equipped to provide emergency care to persons requiring immediate medical treatment
ist
noun
—
A practitioner or supporter of an ism
extreme
Adjective
—
If something is extreme it is very different from normal.
This disease usually causes mild illness, but in exteme cases can cause death.
Few animals can live in the extreme cold of the far north.
extreme
Noun
—
An extreme is a situation or idea taken to its limit, especially with two opposites.
When there is a crime, you have a range of choices. At one extreme you can do nothing. A the other extreme, you can kill the person.