The closest single word to describe someone who's like family to you, etymologically derived from a word meaning "relative". More commonly, the word is used for friends, but it can also be used this way.
"This is Adam, my kith."
"Friend, right?"
"No, he's like family to me. Kith is easier and more serious to use than 'brother from another mother', in my opinion."
"Friend, right?"
"No, he's like family to me. Kith is easier and more serious to use than 'brother from another mother', in my opinion."
by computex January 19, 2019
by Hollowdoll April 24, 2021