Definition: If you are comfortable in a situation, you do not have any worries about it. Level: B2
和朋友们在一起让我感到很自在。
I feel ___comfortable when I am with my friends.
我对把孩子单独留在这里感到不放心。
I don't feel ___comfortable about leaving the children here alone.
孩子们离开家时感到不自在。
The children don't feel ___comfortable when they are away from home.
