loneliness

Loneliness is feeling sad and empty because you don't have anyone around you. It's a strong emotion that can come from having too little social contact or being separated from people who are important to you.

When we think about loneliness, it's easy to imagine someone sitting alone in their room, staring at the wall. But loneliness can also happen when you're surrounded by people, but none of them truly understand what you're going through. Maybe you moved to a new city and don't know anyone yet, or maybe you're working from home and feeling isolated from your coworkers. Whatever the situation, loneliness is that feeling of being disconnected from others.

It's worth noting that "loneliness" can also be used as an adjective to describe someone who prefers to spend time alone, but this doesn't necessarily mean they feel unhappy about it. In this sense, a person might say, "I'm a bit lonely, but I like having some quiet time to myself." However, when we talk about loneliness in its most common usage, we're usually talking about that sad and empty feeling that comes from being disconnected from others.