納入

1. Origins, structure, and basic meaning

• Structure: 納入 (のうにゅう) means delivering goods or paying money due. The examples use delivery action and deadline compound.
• Basic usage: A company delivers ordered equipment on time; a student checks a tuition-payment deadline.

2. Common pitfalls and similar expressions

• Delivery of equipment and deadline for tuition payment
  • 機器を納入した is goods delivery; 学費の納入期限 is payment. The object selects the meaning.