συμπάσχω/sumpaschō

This word is an action. It is a verb.

This word can mean to suffer with another or to suffer as someone else suffered.
This word can mean to sympathize with those who suffer. This means to understand how another person feels and suffers, and to feel sorrow and compassion for that person.
This word can mean to experience the same thing that someone else experienced. have the same thing happen that happened to someone else.

See: Romans 8:17; 1 Corinthians 12:26