Is it ensure, insure, or assure?
((Antilope cervicapra), swift, keen-sighted antelope, family Bovidae (order Artiodactyla), found in herds in grasslands of India. The male stands about 80 centimetres (32 inches) at the shoulder and has long, ringed, spirally twisted horns. Its coat is brown, deepening with age to black; the underparts, inner sides of the legs, and an area around each eye are pure white. The female is usually hornless and yellowish brown, though similarly patterned with white.