adverb
Used when doing something over again, often with a sense of a fresh start or renewed effort. Common in both casual and formal contexts.
改めて考えてみると、彼の言う通りかもしれない。
Thinking about it again, he might be right.
来週、改めてご連絡いたします。
I will contact you again next week.
adverb
formally; deliberately; especially
Used when something is done in a formal, intentional, or deliberate manner, often implying a special occasion or a conscious decision. The 'especially' nuance appears in contexts like 改めて言うまでもない (it goes without saying).
改めてお礼を申し上げます。
I would like to express my gratitude formally.
改めて言うまでもなく、安全が最優先です。
Needless to say, safety is the top priority.