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

See also: critical

• paraphrenia
• paraphrenic schizophrenia
• paraphysis
• paraplegia
• paraplegic
• parapodium
• parapraxis
• paraprofessional
• parapsychological
• parapsychologist
• parapsychology
• paraquat
• paraquat poisoning
• paraquet
• parasail
• parasailing
• parasang
• Parascalops
• Parascalops breweri
• paraselene
• Parashurama
• parasitaemia
• Parasitaxus
• Parasitaxus ustus
• parasite