This is the 15918th most frequent Russian word.
проспектом
"Проспектом" is the instrumental case of "проспект," meaning "avenue" or "prospect" in English.
In this sentence, 'проспектом' is the instrumental case of 'проспект', denoting a location or accompaniment in the act of strolling.
Мы гуляли вечером по оживлённому проспектом.
We strolled in the evening along the lively avenue.
Here, 'проспектом' indicates the instrumental mode of the proposed action, describing the means by which the action is accomplished.
Могу ли я пройти проспектом без лишних остановок?
Can I traverse the avenue without unnecessary stops?
'Проспектом' is used in the instrumental case to describe proximity of the park to the wide avenue.