Use 'hole up' when someone avoids others by staying in one place, especially when they're in trouble or need privacy.

Avoidance Context

'Hole up' often refers to a short-term situation where a person stays away from others for a specific reason.

Temporary Isolation

'Hole up' can imply emotional distress or the need to escape from stress.

'Hole up' can suggest seeking safety from danger or harsh conditions.

The phrase may imply that someone is preparing to stay put for a while by gathering supplies.

'Hole up' is also used to describe animals taking shelter, particularly for hibernation.