No single word in English renders all the shades of toska. At its deepest and most painful, it is a sensation of great spiritual anguish, often without any specific cause. At less morbid levels it is a dull ache of the soul, a longing with nothing to long for, a sick pining, a vague restlessness, mental throes, yearning. In particular cases it may be the desire for somebody of something specific, nostalgia, love-sickness. At the lowest level it grades into ennui, boredom.

I waited for her to catch up, and when I did, she slowed down, and I missed seeing the light in her hair. I never told Nadia how much I liked seeing the halo the sunlight made of her hair. Sometimes silence is a habit that hurts.