incomprehensible

"He is a student of life."

"The pharmacist filled my grandmother's prescription for pain medication. "

"My teacher explained the new math concept, and I understood it perfectly. "

"My daughter's success in school is anything I'm proud of. "

"Please completely fill in the box for your answer, using a number 2 pencil."

"The teacher advanced the students' understanding of fractions by using visual aids. "

"The teacher patiently explained the math problem, and the students were able to understand the steps involved. "

"My grandfather handwrote a letter to my grandmother every week. "

"The feeling is difficult to describe, but not unpleasant."

"The explanation was long and drawn-out."

"The impossible of finishing the project by Friday became a reality when everyone worked late. "

"The complicated instructions on the new software difficult me from completing the project on time. "