back
n.背,背部; 背面,反面; 后面,后部; (椅子等的)靠背
vt.使后退; 支持; 加背书于; 下赌注于
vi.后退; 倒退;
adj.背部的; 后面的; 以前的; 拖欠的
adv.以前; 向后地;
Finally his left hand found the line and he leaned back against the line and now it burned his back and his left hand, and his left hand was taking all the strain and cutting badly.
the restless blue waters