adverb
first of all; in the first place; to begin with
Used to emphasize that something is the most fundamental or primary point, often before stating a reason, condition, or important fact. Similar to まず, but stronger and more formal.
まずもって、この問題を解決しなければならない。
First of all, we must solve this problem.
まずもって、
In the first place, we should acknowledge his efforts.
まず is a common adverb meaning 'first' or 'to begin with', while まずもって is more emphatic and formal, often used to stress a fundamental point.
とりあえず means 'for the time being' or 'first of all' in a provisional sense, whereas まずもって emphasizes a primary, non-negotiable point.
Combination of まず (first) and もって (emphatic particle, from 持って). The exact historical development is uncertain, but it serves as an intensified form of まず.