A word indicating class, order, or rank (e.g. first class, second class).
彼は一等賞を取った。
He won the first prize.
荷物は等級ごとに仕分けされる。
Luggage is sorted by grade/class.
この切符は二等車両用だ。
This ticket is for second-class carriages.
As a suffix meaning 'etc.' or 'and the like' (used after nouns to mean things of the same kind).
申込書に氏名・住所等を記入してください。
Please fill in your name, address, etc. on the application form.
本や雑誌等は入口で配布します。
Books, magazines, etc., will be distributed at the entrance.
祖父母や親類等が集まった。
Grandparents, relatives, and others gathered.
As a prefix meaning 'equal' or 'iso-' (as in equal value or equal parts).
等価交換の原則は重要だ。
The principle of equivalent exchange is important.
正三角形は等辺三角形でもある。
A regular triangle is also an equilateral triangle.