seriously

to be physically harmed or wounded to a severe degree

suffering from a severe illness

to be physically injured to a severe degree

серьезно больной

suffering from a severe illness

Быть очень больным.

очень богатый

possessing a very large amount of money or assets; extremely rich

используется неформально для обозначения чрезвычайно богатого.

possessing a very large amount of money or assets; extremely wealthy

серьезно нездоров

suffering from a severe illness, often used as a euphemism

Быть очень больным.

to think about something carefully and thoroughly before making a decision

серьезно повредить

to cause severe harm or injury to something

нанести серьезный вред или травму чему-либо

серьёзно думать

to engage in careful and thorough thought about something

to cause severe physical or mental damage to someone or something