IPA: /ˈlæpsər/
KK: /ˈlæpsər/
A person who makes a mistake or fails to meet a standard, often due to carelessness or forgetfulness.
The lapser forgot to submit the report on time, which caused delays in the project.
This word originates from Latin 'lapsus', meaning a slip or fall. The term 'lapser' refers to someone who has slipped or fallen away from a previous state or condition.
Think of a 'slip' or 'fall' — that's what a lapser does, as they have fallen away from a previous state.