1. Without warning or announcement
   - unannounced, unheralded

See also: unexpected

• Shetland wool
• Shevat
• Shevchenko
• shew
• SHF
• shh
• Shi'ite
• Shi'ite Muslim
• Shia
• Shia Muslim
• Shiah
• Shiah Islam
• shiatsu
• shibah
• shibboleth
• shield
• shield bug
• shield fern
• Shield of David
• shield-shaped
• shielded
• shielder
• shielding
• shieling
• shift