tunnel; causeway
-ly; structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct
road; path; principle; truth; morality; reason; skill; method; Dao (of Daoism); to say; to speak; to talk; classifier for long thin things (rivers, cracks etc), barriers (walls, doors etc), questions (in an exam etc), commands, courses in a meal, steps in a process; (old) circuit (administrative division)