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