bungle

"My sister was careless about her deadlines, often turning in assignments late. "

"It took him only twenty minutes to perform the task."

"He stumbled over a rock."

"The complete survey was handed in to the teacher. "

"He is a student of life."

"The United States is in an awkward situation with debt default looming."

"The cashier carefully handled the delicate glass ornament. "

"He clumsily spilled his milk while reaching for the cereal box. "

"The new student awkwardly stood in the doorway, unsure of where to put his backpack. "

"The student bungled the presentation, forgetting key points and stumbling over his words. "

"A botched haircut seems to take forever to grow out."

"The presentation about the new school rules was very clear and easy to understand. "