gravely

Extremely sick, often with a life-threatening condition.

Expressing serious worry or anxiety about a situation.

Having sustained very serious physical harm.

To be completely wrong about something important.

Significantly lacking in a necessary quality or substance.

To speak in a very serious and solemn tone.

To inform someone of something in a very serious and solemn tone.

To pose a serious and significant danger to something or someone.

To incline one's head slowly and seriously, often to show agreement or understanding of a serious matter.

To cause deep and serious offense or upset to someone.

To cause severe emotional or psychological injury.