IPA: /ˈdʒɔɪntɪdli/
KK: /ˈdʒɔɪntɪdli/
In a way that involves two or more parties working together or sharing something.
The two companies decided to work jointly on the project to combine their resources.
Jointedly → It is formed from "joint" (from Old French *joint*, meaning joined or connected) and "-ly" (meaning in a manner). The word "jointedly" means in a manner that is joined or connected together.
Think of things being 'joined' together ('joint') and done 'in a manner' ('-ly'). This helps you remember that 'jointedly' means doing something together.