Teamwork is working together so the group does better than the parts. Good teamwork, teamwork won it, a lack of teamwork.
It is not automatic — groups can perform worse than their best member, and research on effective teams points to psychological safety, meaning people can speak up without cost, more than to talent. Note the compound of team and work.
1nounteamworkWorking together so the group does better than the parts.
“We won the match through good teamwork, not individual stars.”
teamwork is a way of working.
Team plus work. Team first meant a set of animals harnessed together.
From team + work. Compare West Frisian teamwurk (“teamwork”).
Etymology from Wiktionary, CC BY-SA