IPA: //koʊˈfaʊnd//
KK: /koʊˈfaʊnd/
To start or create something together with one or more other people.
They decided to cofound a new company to develop innovative technology.
Past: cofounded
Past Participle: cofounded
Cofound is formed from "co-" (meaning together) and "found" (from Old French *fonder*, meaning to establish or set up). The word "cofound" means to establish or set up something together with others.
Think of 'together' ('co-') when you are 'establishing' something ('found'). This helps you remember that cofound means to establish something together.