Or you can also use "심지어".
"~도" and "까지" is more natural way to say "even", but if you wanna know an exact word which is similar to "even", that word is "심지어".
When you use "심지어", it is more natural using with "~도" or "까지".
1) We don't even talk anymore. 우린 심지어 더이상 말도 안해.
2) He is crazy, even psychotic. 그는 미쳤어, 심지어 싸이코 같아.
(in this case, it's hard to translate to Korean. my translation is "He is crazy, he seemed even psychotic.)