particle
Formal or written equivalent of で when marking the place where an action or event occurs.
会議は本社にて行います。
The meeting will be held at the head office.
チケットは会場にて販売します。
Tickets will be sold at the venue.
particle
Formal use marking the time at which something happens, ends, or takes effect; common in announcements such as 本日正午にて.
受付は午後五時にて終了いたします。
Reception will close at 5 p.m.
本日をもちまして、このサービスは終了
particle
Formal or businesslike equivalent of で for the means, method, or medium used to do something.
詳細はメールにてお知らせします。
We will inform you of the details by email.
お支払いは現金にてお願いいたします。
Please pay in cash.
conjunction
Literary or old-fashioned connective use after a noun or noun-like predicate, roughly like formal で or であって, sometimes implying a reason or result.
父は教師にて、母は看護師であった。
My father was a teacher, and my mother was a nurse.
彼は病弱にて、長旅
As of today, this service is discontinued.
He was frail, so he could not endure a long journey.