four, foursome, four of us
Они сидели вчетвером за одним столом.
The four of them were sitting at the same table.
Мы пошли в поход вчетвером.
The four of us went on a hike.
Друг, подселивший к себе брата, теперь живёт вчетвером.
My friend, who let his brother move in with him, now lives with three other people.
Вчетвером нам было веселее играть.
The four of us had more fun playing together.
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