stock-still（adj.） 英 [ˈstɔkˈstɪl] 美 [ˈstɑkˈstɪl] "perfectly still," late 15c., etymologically "as still as a post, as still as a tree trunk;" see stock (n.1) + still (adj.). Compare Dutch stokstil, German stockstill. Also earlier stone-still (early 14c.).该词起源时间：15世纪末
