penumbra /pe-numˈbrə/

1. A partial or lighter shadow round the perfect or darker shadow produced by an eclipse or by a large unfocused light source shining on an opaque object
2. The less dark border of a sunspot or any similar spot
3. The part of a picture where the light and shade blend into each other

penumˈbral adjective

• southing
• southings
• southland
• southlander
• southlanders
• southlands
• southmost
• southpaw
• southpaws
• south polar
• south pole
• south poles
• southron
• Southron
• southrons
• Southroun
• souths
• southsay
• South Sea
• South Seas
• south-seeking
• south-south-east
• south-south-west
• southward
• southwardly