N

n + ate --> nate

in + nate --> innate 

nate/ + ion --> nation 

nate/ + ion + al --> national 

nate/ + ive --> native 

nate/ + ive/ + ity --> nativity 

pre + nate/ + al --> prenatal 

nate/ + ure --> nature 

nave/ + ig + ate/ + ion --> navigation 

nave/ + y --> navy

nine/ + th --> ninth 

• drops its <e> before the <th> so it's not misparsed as having an <-eth> suffix 

https://linguisteducatorexchange.com/2013/12/08/its-all-relative/