Why “wistfulness” is a great word
WISTFULNESS — [Noun] A state of melancholy or vague, often yearning, pensiveness. From the adjective wistful (meaning 'full of yearning or melancholy thought') + the noun-forming suffix -ness (indicating a state or quality). The adjective 'wistful' is of obscure origin but is presumed to be an alteration of the now-obsolete 'wistly' (meaning 'intently'), which itself may derive from 'whist' (meaning 'silent'). Unlike nostalgia, which is a sentimental longing for a specific past, or sadness, which denotes a broader, more direct unhappiness, wistfulness is a quieter, more ambient mood of bittersweet reflection. It is the scent of rain on hot pavement that carries a memory without a name, the sight of empty train tracks receding into a dusk you are not traveling into, or the particular silence that follows the last note of a familiar song—a tender ache for a possibility that never was, and the quiet grace of its passing.