rigorous

"The dancer's execution of the pirouette was graceful and precise. "

"The student meticulously researched the topic and scrupulously followed the instructions for the history essay. "

"The storm caused severe damage to the school building. "

"The rigour of the final exam meant many students studied for weeks. "

"accurate knowledge"

"The farmer carefully plowed the field, creating deep furrows to ensure a thorough drainage system. "

"All he had to show for four years of attendance at college was a framed piece of paper."

"strict embrace"

"The winter holidays are a popular time for family gatherings. "

"The teacher's voice was intense as she explained the difficult math problem. "

"The teacher was accused of favoring some students over others in her grading. "

"The lightning caused thunder."