anam ċara [Gaelic]
(n) a soul-friend; a loved one who awakens your life in order to free the wild possibilities within you

crepuscular rays
(n) Rays of sunlight coming from a certain point in the sky.  Also known as ‘God’s rays’.

gökotta [Swedish]
(n) lit. ‘dawn picnic to hear the first birdsong’; the act of rising in the early morning to watch the birds or to go outside to appreciate nature

kitsch
(adj) considered to be in poor taste but appreciated in an ironic or knowing way

komorebi 木漏れ日 [Japanese]
(n) the filtering of sunlight through the gaps between trees and leaves; the interplay between sunlight and  leaves

onism
(n) the awareness of how little of the world you’ll be able to experience

pretichor
(n) the way the earth smells after the first rain following a long period of warm, dry weather

skeuomorph
(n) a derivative object that retains ornamental design cues from structures that were necessary in the original
examples:
online shopping cart icon, the shutter sound on a digital camera, electric candles

saudade [Portuguese]
(n) a nostalgic longing to be near again to something or someone that is distant, or that has been loved and then lost; “the love that remains”

sonder
(n) the realization that each random passerby is living a life as vivid and complex as your own—populated with their own ambitions, friends, routines, worries and inherited craziness—an epic story that continues invisibly around you like an anthill sprawling deep underground, with elaborate passageways to thousands of other lives that you’ll never know existed, in which you might appear only once, as an extra sipping coffee in the background, as a blur of traffic passing on the highway, as a lighted window at dusk.

tsundoku [Japanese]
(v) the act of leaving a book unread after buying it, typically piling it with other such books