Beached, marooned (7)
I believe the answer is:
aground
I believe this is a double definition.
'beached' is the first definition.
(similar in meaning)
'marooned' is the second definition.
(thesaurus)
(Other definitions for aground that I've seen before include "Beached" , "(Of ship) touching the bottom" , "(Of a ship) stuck on the seabed" , "High and dry" , "on rocks, perhaps" .)