severe
/ˈsɛv.ɪr/Definitions
1. adjective
extremely bad or unpleasant; causing a great deal of pain or suffering.
“The severe storm destroyed many homes in the area.”
2. noun
a severe illness or injury.
“She had a severe case of the flu.”
3. verb
to make or become severe.
“The doctor said that her condition would severely worsen if left untreated.”