This is the 5932nd most frequent Russian word.
саммитом
The Russian word "саммитом" means "summit" (a high-level meeting) in the instrumental case.
The word "саммитом" here is the instrumental case of "саммит" (summit), showing association or means used within the context.
Мы обсуждали вопросы, связанные с саммитом.
We discussed topics related to the summit.
The word "саммитом" appears in the sentence to show temporal relation, meaning 'before the scheduled summit'.
Перед саммитом проводятся предварительные переговоры.
Preliminary negotiations are held before the summit.
The word "саммитом" is used to indicate involvement or proximity in relation to the event, showing the summit as the focal element of the experience.