1. Incapable of being justified or explained
   - indefensible, insupportable, unjustifiable, unwarranted

See also: inexcusable, unwarrantably

• winter currant
• winter fern
• winter flounder
• winter flowering cherry
• winter hazel
• winter heath
• winter heliotrope
• winter jasmine
• winter melon
• winter melon vine
• winter mushroom
• Winter Olympic Games
• Winter Olympics
• winter purslane
• winter rose
• winter savory
• winter savoury
• winter solstice
• winter squash
• winter squash plant
• winter sweet
• winter urn
• winter vomiting virus
• winter wren
• winter's bark