He lost his arm during the final rasengan/chidori clash in the final fight of Naruto Shippuden. He then refused a prosthetic replacement offered by Tsunade, supposedly because he wanted to get away quickly to see the world through the eyes of one who is not trying to destroy it.
Essentially, if you sent a voice message to someone and they chose to keep it, you'll see a “Kept” indicator beneath the voice message to let you know that the message didn't expire.
He tells Tauriel goodbye, but not before pleading with her to come with him. Kili: “I know how I feel, I'm not afraid. You make me feel alive.”
adverb Informal. kind of, rather: The movie was kinda boring.