Yantra literally means "machine" "apparatus" or "device". It can also be be described as something that fastens or is fastened such a s concept or a specific energy pattern. The human body itself is a yantra and similarly drawn, written, or sculpted yantra are often the mystical bodies of divinities. Yantra often contain numbers, syllables, and words from various formulas that carry specific energies. When these symbols are configured in specific ways, they become harmoniously resonant. They then vibrate at specific frequencies which permeate the energy field of a space or the person wearing them. These energies magnetize specific things and also repel energies not harmonious to them.