early 15c., "weak, dissolved," from Latin remissus "relaxed, languid; negligent," past participle of remittere "slacken, abate, let go" (see remit). Meaning "characterized by lack of strictness" is attested from mid-15c.; that of "characterized by negligence" is from mid-15c.
例文
1. I would be remiss if I did not do some-thing about it.
これに対して何かしなければ、無責任です。
2.It was remiss of them not to inform us of these changes sooner.
彼らは不注意で、これらの変化を早めに知らせてくれなかった。
3.It was remiss of him to forget her birthday.
彼は彼女の誕生日を忘れてしまった。本当に愚かだった。
4.I would be remiss if I did not do something about it.