remiss
UK: rɪˈmɪs | US: rɪˈmɪs
adj. negligent or careless in performing a duty
adj. lacking attention to proper behavior or responsibility
The word "remiss" originates from Latin remissus (past participle of remittere), combining re- (back) and mittere (to send). The core idea is "sent back" or "relaxed," evolving into the modern sense of negligence—as if one has "let go" of their duty. This reflects a vivid metaphor of responsibility slipping away due to inaction.
The manager was remiss in not addressing the safety concerns.
It would be remiss of me to ignore such an important deadline.
She was never remiss in her duties as a caretaker.
The teacher scolded the student for being remiss with homework.
His remiss attitude led to costly mistakes in the project.