easy (not difficult; requiring little effort): The test was very easy. It was an easy job, so I did it all by myself.
simple (not difficult to do or understand, not complicated): I found the work quite simple. The answer is very simple.
undemanding (not requiring much mental or physical effort): I’m trying to find an undemanding job.
straightforward (not difficult to do or understand, not complicated): The installation was fairly straightforward.
painless (not difficult or stressful to do): There must be more painless solutions to this problem.
cushy informal (requiring little or no effort): I want to find a nice, cushy job like yours.
facile formal (not difficult to do or achieve): That was a facile victory.
child’s play informal (requiring no effort): For me, fixing cars is child’s play. The test was a real child’s play.
duck soup US informal (not difficult to do or achieve): The job is duck soup for experienced engineers.