1. lacking down feathers or soft plumage; not covered with down
Usage: technical or ornithological usage
2. lacking softness or comfort; harsh or austere
Usage: rare or literary

Examples

• The downless chick was still developing its feathers.
• A downless pillow would not be very comfortable for sleeping.
• The bird's downless wings made it vulnerable to cold temperatures.
• She preferred a downless mattress despite its lack of cushioning.
• The downless texture of the fabric felt rough against her skin.