underhanded

"The student made surreptitious notes during the lecture, trying not to be seen by the teacher. "

"After school, my family went to a restaurant for dinner. "

"My age disqualifies me for the position."

"The horizontal of the classroom desk is sturdy enough to hold a large stack of books. "

"Your underhand should be entirely under the quilt."

"The teacher positioned the globe on the table so the students could see it easily. "

"She discreetly packed her belongings before leaving the room. "

""She gave her friend a compliment on her beautiful painting." "

"The students, collectively, decided to postpone the project until next week. "

"The bookshelf was arranged horizontally, so the books lay flat instead of standing up. "

"The library was understaffed, so the waiting lines were long. "

"They had won the title for five successive years."