navigable
adj. 可航行的；可驾驶的；适于航行的
例句
Prior to 1815, western farmers who did not live on navigable waterways were connected to them only by dirt roads and mountain trails.
1815年之前，那些没有生活在通航的水路旁的西部农民只能从土路和山道前往那些航道。
The river is navigable now.
河开了。
《新英汉大辞典》
The lower reaches of the river are navigable for steamers.
这河的下游能够行驶轮船。
