1. Not by design or artifice; unforced and impromptu
   - unstudied

See also: candid, unaffected

• blood donor
• blood dyscrasia
• blood extravasation
• blood feud
• blood flower
• blood fluke
• blood glucose
• blood group
• blood heat
• blood kinship
• blood knot
• blood lily
• blood meal
• blood money
• blood orange
• blood plasma
• blood platelet
• blood poisoning
• blood pressure
• blood profile
• blood pudding
• blood relation
• blood relative
• blood sausage
• blood serum