It means to go through a hardship or tribulation with someone. Like if someone is going on a diet or quiting smoking or something and you join them or do something difficult with them.
It starts with con... I believe
Top answer
Commiserate? No, that is not quite right.
— Mister Micawber
Commiserate?
No, that is not quite right.
Free · every Monday
Get the Weekly English Kit 📬
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.