1. Causing fear or anxiety by threatening great harm
   "a life-threatening disease"
   - dangerous, grave, grievous, serious, severe

See also: critical

• prosecuting attorney
• prosecuting officer
• prosecution
• prosecutor
• proselyte
• proselytise
• proselytiser
• proselytism
• proselytize
• proselytizer
• prosencephalon
• Proserpina
• Proserpine
• prosily
• prosimian
• Prosimii
• prosiness
• prosit
• prosodic
• prosodic system
• prosodion
• prosody
• ProSom
• prosoma
• prosopagnosia