painless

adj

1. Free from pain; without pain or trouble.

   “There are now washless dishes, painless razors, painless shoes, painless corsets, prepared soups, painless photographs (it used to give you a stiff neck for three days to have your picture taken)[…]”

2. Not difficult; easy.

   “At first it seemed like a very painless way to get my work done and I told Milly to let me sleepwrite as much as I liked. We discovered, however, that although my subconscious might lead me to the typewriter, it couldn't make me think.”