temeljni

1. fundamental; basic
   Sloboda govora je jedno od temeljnih prava. — Freedom of speech is one of the fundamental rights.
   To su temeljne vrednosti našeg društva. — Those are the basic values of our society.
2. foundation
   Radnici su oštetili temeljni zid zgrade. — The workers damaged the building's foundation wall.
3. (of work, a check) thorough
   Za vikend radimo temeljno čišćenje stana. — This weekend we're doing a thorough clean of the flat.
   Policija je sprovela temeljnu istragu. — The police carried out a thorough investigation.

A foundation stone is kamen temeljac.