The simplest and most obvious use of multiple inheritance is to ‘‘glue’’ two otherwise unrelated classes together as part of the implementation of a third class. The S a t e l l i t e class built out of the T a s k and D i s p l a y e d classes in §15.2 is an example of this. This use of multiple inheritance is crude, effective, and important, but not very interesting. Basically, it saves the programmer from writing a lot of forwarding functions. from << The C++ programming language>> page 399 What's the meaning of curde in above sentence ? Does it mean "Natural" or "awkward" ? My interpretation would be "Natural", because the dictionary says so. but the book in our language describe it as "awkward,abrupt ".