IPA: /ˌpæsɪˈfɪstɪkli/
KK: /pæsɪfɪstɪkli/
In a way that promotes peace and avoids violence, similar to the beliefs of someone who is against war.
She approached the conflict pacifistically, seeking dialogue instead of confrontation.
Pacifistically → It is formed from "pacificus" (from Latin, meaning peaceful) and the suffix "-ly" (meaning in a manner). The word "pacifistically" means in a manner that promotes peace or non-violence.
Think of being 'peaceful' ('pacificus') and doing so 'in a manner' ('-ly') — that's why pacifistically means acting in a peaceful way.