1-a sharp point facing away from the head of an arrow, fish hook, or harpoon, designed to make it difficult to remove
2-a pointed or wounding remark
3-a small fish often kept in aquariums. Genara: Barbus Puntius
4-a white cloth headdress covering the chin and throat, worn by women in the Middle Ages
5-a stiff filament that forms the framework of a feather. The barbs stick out on each side of the main shaft.
6-a growth on an animal's head like a beard or whisker.
7-a hooked projection on some plants and fruits
to provide something with a barb or barbs