"Ceases" Natural Recordings by Native Speakers
Ceases means to stop or discontinue doing something. It can also mean to come to an end or no longer continue. For example: "The company ceased operations due to financial difficulties."
Ceaselessly means without stopping or pausing; constantly; continuously. It can describe an action, process, or situation that occurs repeatedly and uninterruptedly. Example: She worked ceaselessly on the project for weeks, not taking a single break.