Русско-англо-русский юридический словарь

Gross negligence is a legal concept which means serious carelessness. Negligence is the opposite of diligence, or being careful. The standard of ordinary negligence is what conduct one expects from the proverbial "reasonable person." By analogy, if somebody has been grossly negligent, that means they have fallen so far below the ordinary standard of care that one can expect, to warrant the label of being "gross." Prosser and Keeton describe gross negligence as being "the want of even slight or scant care", and note it as having been described as a lack of care that even a careless person would use. (Wikipedia)

“Espresso” is pronounced “expresso” by many people, even though there is no “x” in the spelling. This pronunciation probably arose by analogy with the word “express”. (The Conversation)