Not too good.
Every word has two histories.
The other is your personal history with that word. According to Merriam-Webster online, it comes from the word mendacious , which is related to the word amend . I first came across the word mendacity when I was in jail. I was a teenager, barely 18, almost half my life ago. I was in a cell with about 30 other prisoners, in a cell designed to hold about 10.