This is the 1067th most frequent Japanese word.
提出
"提出" means "submission" or "to submit."
提出 is used here to mean the act of submitting or handing in homework, specifically assigning responsibility to the teacher.
彼は宿題を先生に提出しました。
He submitted his homework to the teacher.
提出 refers to the act of submitting a formal requirement, specifically academic work, which aligns with changes to deadlines.
論文の提出期限が延長されました。
The submission deadline for the thesis was extended.
提出 in this context emphasizes offering or presenting ideas for contribution to a project or collaborative effort.