perustua (Finnish) comes from Finnish perustaa, from Finnish perus, from Finnish perä, from Proto-Finno-Ugric perä, from Proto-Uralic *perä — hindquarters, back part of something.
perustua (Finnish): To be based on; To be based on, be grounded in;...
Definitions
To be based on; To be based on, be grounded in;...