Pertinacious(pur-tn-ey-shuhs)
Meaning
determined, resolute, persistent
The word pertinacious sounds like 'Per (in Hindi) Tina says yes'. A girl named Tina is about to perform in a dance competition. But she has a minor fracture in her leg. Her parents advise her to step down from the competition. Per Tina says yes, she says that she will do it. She seems to be very pertinacious (persistent). So, pertinacious means determined and resolute.
Vacuous(vak-yoo-uhs)
Meaning
empty, mindless
The word vacuous has been derived from the word 'vacuum'. Vacuum means empty space.
