When we say someone "sails through" something, we usually mean that they completed the task with ease and little difficulty. Some synonyms that can be used to replace "sails through" include breeze through, handle with ease, effortlessly complete, master, excel at, and accomplish with ease. These phrases indicate that the person completed the task or obstacle with ease and little setback. Other words that can be used are "ace," "just no big deal," "nail," and "blow through." It's important to remember that selecting the right synonym can help communicate the intended message more effectively and leave a stronger impact.