To withdraw something is to pull it out, pull it back, or pull it away. And to withdraw yourself is to pull yourself away. In the word "withdraw," with means "away," and draw means "pull or take." So, to withdraw something is to take it away.
If you withdraw money from your bank, that means you take it out so you can use it. This person withdrew a big stack of bills.
You can withdraw from a club or a class, meaning you leave it: you take yourself away from it. And if you feel sad or moody, you might withdraw from your friends or withdraw from your family. That means you separate yourself: you take yourself away, apart from the others. A withdrawn person might be shy, or scared. Or, someone can be withdrawn by nature. Sometimes I can seem withdrawn, but it's just because I enjoy spending time alone.
Just like you withdraw objects, or withdraw yourself from a group or a situation, you can also withdraw things that you can't see or touch. For example, to withdraw a question after you ask it means that you take it back: you decide you don't want an answer.
Remember: if somebody withdrew, that means they left, they went away, or they went somewhere else, apart from the group. You could refer to that action as their withdrawal. And, when you've withdrawn something, you've taken it back. Finally, people who seem withdrawn are shy or tend to pull themselves back from other people.
Idea 1: "I dig around in my (pockets, backpack, drawer, or other container), eventually withdrawing (an item of some kind)."
Idea 2: "(Somebody) seems withdrawn (in class, at home, or at a sport or other activity), so I'll try (doing something friendly to help them be part of the group)."
Enroll in "Make Your Point, Jr." for one-on-one tutoring.