A/V-아/어도 — even if, regardless whether

-아/어도 indicates that the situation in the second clause occurs regardless of the action or state described in the first clause.

It means 'even if' or 'regardless whether' in English.

When the verb stem ends in ㅏ or ㅗ, -아도 is used, and when the verb stem ends in any other vowel, -어도 is used.

For verbs that end in 하다, the form changes to 해도.

Details

The meaning of -아/어 can be emphasized by using 아무리 in front of the verb, giving the expression the meaning of 'no matter how (much)'

나는 바빠도 아침을 꼭 먹어요.

Even if I'm busy I eat breakfast.

그 옷이 비싸도 살 거예요.

I'll buy those clothes even if they're expensive.

Indicates that the second clause will happens regardless of the described state or action of the first clause.