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

• skip zone
• skip zones
• skirl
• skirled
• skirling
• skirlings
• skirl-in-the-pan
• skirls
• skirmish
• skirmished
• skirmisher
• skirmishers
• skirmishes
• skirmishing
• skirmishings
• skirr
• skirred
• skirret
• skirrets
• skirring
• skirrs
• skirt
• skirt chaser
• skirt chasers
• skirt-dancing