This is the 10502nd most frequent Russian word.
взятии
The Russian word "взятии" means "taking" or "capture" (prepositional case, singular form).
'взятии' refers to the act of capturing or taking in this context.
В романе рассказывается о взятии города.
The novel tells about the capture of the city.
'взятие' denotes a specific event, the taking or conquering of a fortress.
После взятия крепости войска отправились дальше.
After the capture of the fortress, the troops moved further.
'взятии' here figuratively refers to the act of taking or making (a decision).