Formal expression used as をもって to indicate the means, method, or instrument by which something is done. Often found in formal announcements or written language.
書面をもってお知らせいたします。
We will inform you by written notice.
With this, we conclude the meeting.
because of; due to; on account of
Formal expression used as をもって to indicate a reason or cause. Similar to によって but more literary.
He retires due to old age.
on (a date); at (a time); as of
Formal expression used as をもって to specify a point in time, often for deadlines, effective dates, or the end of a period.
We will close our business as of today.
I will resign effective March 31st.
emphatic particle
Adds emphasis to the preceding word, often in set phrases like 身をもって (through one's own experience) or 誠心誠意をもって (with utmost sincerity). Not freely productive.
Experience it firsthand.
in addition; moreover; as well as
Used as でもって to add information, similar to で plus もって. Casual or colloquial when used as a conjunction.
He's smart. And what's more, he has a good personality.
Conjunctive use indicating a result or conclusion, often in formal or written contexts. Similar to したがって or それゆえ.
Insufficient evidence; therefore, the defendant is found not guilty.