(1)突然の上下動（船や他の乗り物で起きるような）
(2)abrupt up-and-down motion (as caused by a ship or other conveyance); "the pitching and tossing was quite exciting"
さらに詳しく
(1)経度に関して
(2)with respect to longitude; "longitudinally measured"
(1)間違った方法で交差させた本結びで、したがって不安定
(2)a reef knot crossed the wrong way and therefore insecure
