N4 — outside your level filter
でも
even N; N or something — marks a noun as a surprising case, or names it loosely as a suggestion
これくらい、子供でも分かるよ。
kore kurai, kodomo demo wakaru yo.
Even a kid could work this much out. casual
お茶でも飲みませんか。
ocha demo nomimasen ka.
Would you like some tea or something? neutral