Elodie was a nostalgic person, but she hated the charge. The word was terribly maligned. People used it as a stand-in for sentimentality, when it wasn’t that at all. Sentimentality was mawkish and cloying, where nostalgia was acute and aching. It described yearning of the most profound kind: an awareness that time’s passage could not be stopped and there was no going back to reclaim a moment or a person or do things differently.