seaway
/ˈsiːweɪ/noun
1
- an inland waterway capable of accommodating seagoing ships海船内陆水道。
1.1
- a natural channel connecting two areas of sea海路。
1.2
- a route across the sea used by ships海上航道。
2
- in sing. a rough sea in which to sail（行船的）汹涌海面：
with the engine mounted amidship, the boat pitches less in a seaway.
把发动机装在船中央, 在汹涌的海面上船就不那么上下颠簸了。