godan verb (-mu), intransitive verb
Formal, somewhat stiff equivalent of 済む. Used for tasks, procedures, or matters reaching completion.
手続きが相済みましたら、ご連絡いたします。
Once the procedures are completed, we will contact you.
We will begin as soon as preparations are finished.
godan verb (-mu), intransitive verb
fulfill one's obligations
Often used in the negative form 相済まない or 相済みません to express that one's obligations are not fulfilled, functioning as a formal apology. The positive form is rare.
See also: 相済まない
ご迷惑をおかけして相済みません。
I am very sorry for the trouble I caused.
約束を守れず、相済まない気持ちでいっぱいです。
I am filled with regret for not keeping my promise.