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

See also: critical

• scribe
• scriber
• scribing block
• scrim
• scrimmage
• scrimmage line
• scrimp
• scrimpy
• scrimshank
• scrimshanker
• scrimshaw
• scrimy
• scrip
• scripophily
• Scripps
• MLitt
• MLS
• mm
• mm Hg
• MMPI
• MMR
• Mn
• MNC
• mnemonic
• mnemonics