protract
v.
1530s, a back-formation from protraction and in part from Latin protractus, past participle of protrahere "to draw forth, prolong." Etymologically identical with portray, which was altered in French. Related: Protracted; protracting.
〔蒋〕[pro-向前，tract拉;’向前拉”→拉长] 延长，伸长，拖延
〔李〕[pro- = forward 向前；tract = to draw 拉→“to draw the time forward把时间向前拉”→] v. prolong拖延，延长