随意suí yì [as one likes] 随着自己的意愿
随便suí biàn 1. [be free and easy;random]∶不加限制;不受拘束 2. [anyhow; any]∶任凭,无论 3. [immediately]∶随即,马上 4. [do as one chooses (likes) pleases]不多加斟酌,怎么方便就怎么做