erect annual of tropical central Asia and Africa having a pair of divergent spines at most leaf nodes

A clear hard variety of corundum used as a gemstone that is usually blue but may be any color except red, A precious stone next in hardness to the diamond, and nearly as valuable when of fine quality_ a variety of the mineral corundum, a type of South American hummingbird, adjective_ of a deep blue colour, of something having the color of a blue sapphire, Of or resembling sapphire; sapphirine; blue

make off with belongings of others

frat(ə)nŋ/ adj whichcauses fear  a frightening sound of footstepsin the corridor  He had a frighteningthought – what if no one heard his cries forhelp? Synonym terrifying. Antonymsoothing