a.

1. 不穩定的；動蕩的；易變的
   Conditions in the coastal towns were unsettled after the hurricane.

   颶風過後沿海城鎮的形勢頗不穩定。

2. 未定居的，無居民的
   A large part of the southwestern United States is unsettled desert.

   美國西南部的大部分是無人居住的沙漠。

3. 未解決的；不定的；懷疑的
   The argument remains unsettled.

   這項爭議仍未解決。

4. 未付清的，未清算的

1. unsettle的動詞過去式、過去分詞

adj.

1. lacking stability; changeable or liable to change.
   ▸agitated; uneasy.
2. not yet resolved.
   ▸(of a bill) not yet paid.
3. (of an area) having no settlers or inhabitants.