particle N4 essential casualpolitewritten

でも — even ~ / ~ or something

でも

Meaning

① even ~ (extreme example): even ~ — picks a surprising or extreme case to make a point

② ~ or something (casual suggestion): ~ or something — softens a suggestion by offering one option as an example

① even ~ (extreme example)

この問題もんだいは子供こどもでもできる。

Even a child can do this problem.

② ~ or something (casual suggestion)

お茶ちゃでも飲のみませんか。

Shall we have some tea or something?

Attaches to	Form	Example
Noun	Noun + でも	コーヒー → コーヒーでも

① even ~ (extreme example)

先生せんせいでも間違まちがえることがある。

Even teachers make mistakes sometimes.

一円いちえんでも無駄むだにしたくない。

I don't want to waste even one yen.

② ~ or something (casual suggestion)

映画えいがでも見みに行いこう。

Let's go see a movie or something.

週末しゅうまつに散歩さんぽでもどうですか。

How about a walk or something this weekend?

With a question word, でも means 'any ~': 誰だれでも (anyone), 何なんでも (anything), いつでも (anytime).
Don't confuse this with sentence-initial でも, which means 'but / however': でも、行いきたくない (But I don't want to go).

Jengo shows でも the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.

Sources Compiled with reference to A Dictionary of Advanced Japanese Grammar, A Dictionary of Basic Japanese Grammar.