This is the 614th most frequent Bulgarian word.
енергийната
The Bulgarian word "енергийната" translates to "the energy" in English (definite form, feminine).
Here, "енергийната" is modifying "криза" (crisis), indicating that the crisis relates to energy.
Енергийната криза засегна всички домакинства.
The energy crisis affected all households.
In this context, "енергийната" modifies "ефективност" (efficiency), specifying that the efficiency pertains to energy.
Увеличението на енергийната ефективност е важно за устойчивото развитие.
The increase in energy efficiency is important for sustainable development.
Here, "енергийната" is modifying "ситуация" (situation), describing the specific nature of the situation as related to energy.