distinctly
In a very clear and easy-to-notice way.
Distinctly means clearly and unmistakably, in a way that leaves no doubt or confusion. When you remember something distinctly, you recall it with sharp, vivid detail. When a teacher speaks distinctly, every word comes through clearly, making it easy to understand exactly what she's saying.
The word suggests something stands out so much that you can't miss it or confuse it with something else. If you distinctly heard your name called across a crowded playground, you know without question that someone was calling for you specifically, not someone else. If a photograph shows someone distinctly taller than everyone around them, the height difference is obvious and unmistakable.
You might also use distinctly to emphasize that you clearly remember or perceive something important: “I distinctly remember returning that library book” means you have a clear, confident memory of doing it. The word adds weight to your statement, showing you're certain and not guessing. When something appears, sounds, or feels distinctly different, that difference is real and noticeable, not subtle or imagined.