gait – n. the way a person walks and moves the body

artificial intelligence – n. ability of a machine to use and analyze data in an attempt to reproduce human behavior

commercial – adj. related to buying and selling things

sequence – n. a series of related things

biometric – adj. involving the application of statistical analysis to biological data

stability – n. the quality of not being likely to change or move

trend – n. a way of behaving, proceeding, etc., that is developing and becoming more common