What is the difference between injective and injective?

I'm curious about the distinction between the terms "injective" and "injective." Could you elaborate on the key differences between them? It seems like there might be some nuance or specific context in which one is used over the other, but I'm having trouble grasping the exact distinction. Could you provide an example or two to illustrate the difference? Additionally, are there any common misunderstandings or confusion surrounding these terms that you often encounter? I'd appreciate your clarification on this matter.