Complicated.
Having an affair with someone.
Associated with others, be a participant or make someone be a participant (in a crime, process, etc.)
To take part in a picnic.
An easy or pleasant task.
An informal social gathering, usually in a natural outdoor setting, to which the participants bring their own food and drink.
The meal eaten at such a gathering.
A cut of pork from the shoulder area (above the front leg) of a pig.