stalking（adj.）
"walking softly or stealthily" mid-15c., present-participle adjective from stalk (v.1).
A stalking-horse (1510s) in literal use was a horse draped in trappings and trained to allow a fowler to conceal himself behind it to get within range of game; the figurative sense of "person who participates in a proceeding to disguise its real or more important purpose" is recorded from 1610s (Webster, "White Devil").
该词起源时间：15世纪中期