Эмпатия (empatiya) translates directly to "empathy." It's a sophisticated and less common word to find in song lyrics, making it stand out.
In the context of the song, the singer expresses a longing for someone who will truly understand them, even saying, "Однажды кто-то расскажет, что же такое эмпатия" (One day someone will tell me what empathy is). This highlights a deep desire for emotional connection and understanding, making the word particularly poignant and meaningful.
Однажды means "one day", and the song uses it like a drumbeat. Almost every line starts with it. One day someone will ask how his day went, will know what he ate and what he wore, will check whether he got home safely. One day someone will notice he takes his tea without sugar, that he goes quiet when it hurts, that stress has made him thin, that he fights his fears at night. It's a list of very small things, and that's exactly why it lands.
Klava Koka's half is the same wish from the other side. One day someone will tell her she can stop being strong, she'll hide behind his back and grow wings of her own, they'll rewatch the best films wrapped up together, and in his t-shirt with no makeup she'll be the most beautiful person he knows. She'll cook instead of ordering in, she'll call him her family, and one day someone small will wake them both up in the morning. The chorus mixes Russian and English in one breath, so listen for the lullабу spelling.