1. Without warning or announcement
   - unannounced, unheralded

See also: unexpected

• hepatojugular reflux
• hepatolenticular degeneration
• hepatoma
• hepatomegaly
• hepatotoxic
• hepatotoxin
• Hepburn
• hepcat
• Hephaestus
• Hephaistos
• hepta-
• heptad
• radar target
• radarscope
• Radclyffe Hall
• raddle
• raddled
• Radhakrishnan
• radial
• radial artery
• radial asymmetry
• radial engine
• radial keratotomy
• radial nerve
• radial pulse