であれ
Meanings
1
no matter (what, who, etc.); even if
Follows a noun or a question word (e.g., 何, 誰, どこ) to mean 'no matter what/who/where' or 'even if'. Often used in formal or written contexts.
No matter what the reason is, being late is being late.
No matter who it is, they cannot enter this room.
2
Used in the pattern ...であれ...であれ to list alternatives, meaning 'whether ... or ...'. Formal and often written.
Whether it rains or snows, the game will be held as scheduled.
3
Imperative form of である, meaning 'be'. Rare and literary; not used in modern conversational Japanese.
See also: である
"Be strong," he said.