nth 
/ˈɛnθ/ adjective
/ˈɛnθ/ adjective — used to refer to an unknown number in a series of numbers ▪ I told him for the nth time that I would not support him. [=I told him again that I would not support him, as I have told him many times before]
to the nth degree
: extremely : as much as possible
▪ He is dedicated to the nth degree. [=he is extremely dedicated]
▪ He is dedicated to the nth degree. [=he is extremely dedicated]
