1. Not easily perturbed or excited or upset; marked by extreme calm and composure
   "hitherto imperturbable, he now showed signs of alarm"; "an imperturbable self-possession"
   - unflappable

See also: composed, imperturbableness

• Hemigalus hardwickii
• Hemigrammus
• hemihedral
• Hemimetabola
• hemimetabolic
• hemimetabolism
• hemimetabolous
• hemimetaboly
• hemimetamorphic
• hemimetamorphosis
• hemimetamorphous
• hemimorphic
• hemimorphite
• hemin
• Heming
• Hemingway
• Hemingwayesque
• hemiparasite
• hemiparasitic
• hemiplegia
• hemiplegic
• hemipode
• Hemiprocnidae
• Hemiptera
• hemipteran