unnavigable
The word "navigation" has the same root as "navigate." They both come from the Latin word "navigare," meaning "to sail."
To navigate around the world at the same try
write two words that belong to the same word family houseboat
unnavigable
appear
I belong in this family. -- belong (in). I am included in this family. -- included (in). I am a member of this family. - member (of) I am one of this family. -- one (of)
navigate
A word that could be part of a word family for petroleum is linoleum.
uncovered
The building is part of my family's heritage.
part