A conjunction meaning 'even so', 'nevertheless', or 'still' — used to indicate that something remains true despite the preceding fact.
雨が降っている。それでも試合は予定どおり行われた。
It's raining. Even so, the match went ahead as planned.
値段は高い。それでも買いたい人が多い。
The price is high, but many people still want to buy it.
説明した。それでも彼は納得しなかった。
I explained it; nevertheless, he wasn't convinced.
状況は厳しい。それでも諦めるわけにはいかない。
The situation is tough, but even so we cannot give up.