Сегодня мне спится хуже, чем вчера.

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Breakdown of Сегодня мне спится хуже, чем вчера.

• вчера: yesterday
• сегодня: today
• чем: than

Questions & Answers about Сегодня мне спится хуже, чем вчера.

What does спится mean here?

Спится comes from the verb спаться, which is an impersonal reflexive verb. In sentences like this, it does not simply mean to sleep in the basic sense.

A more literal idea is something like:

• it is sleeping to me
• sleep comes to me
• I am able to sleep / I find myself sleeping

So Мне спится хуже means not just I sleep worse, but more specifically:

• I’m sleeping worse
• It’s harder for me to sleep
• Sleep is going worse for me

This construction often focuses on the experience or ease of sleeping, not just the bare fact of sleeping.

Why is it мне, not я?