#proper nouns

• Back — A technical term borrowed from English, used in sports jargon to designate a player who acts as a defender or a member of the backline within a team (especially in rugby, American football, or old-style traditional football). This player holds an essential defensive and structural role, responsible for blocking opposing attacks, intercepting balls, and initiating counterattacks from their own half.
• Background — A polysemous term borrowed from English, denoting: 1. In computer science, the screen wallpaper or secondary software processes hidden from the user. 2. In visual arts and photography, the backdrop or secondary plane of a composition. 3. In sociology and management, the collective knowledge, education, professional experience, or socio-cultural context of a person's past that shapes their current development.
• Backspace — A specialized key on a computer keyboard or typewriter, used to delete the character immediately preceding the text cursor and to move the cursor back by one position. In a structural software sense, this key transmits a specific control code (ASCII 8) that enables rapid text editing and error correction during typing.
• Baclod — Commercial trade name of a muscle relaxant medication containing the active substance baclofen. This structural compound is clinically used to reduce and alleviate excessive muscle spasticity occurring in chronic neurological disorders, such as multiple sclerosis, spinal cord diseases, or stroke sequelae.