shadowy
adjective uk/ˈʃæd.əʊ.i/ us/ˈʃæd.oʊ.i/
多阴影的;阴暗的，幽暗的
dark and full of shadows
She was startled by a sudden movement in the shadowy hallway. 幽暗的走廊中突然有动静，把她吓了一跳。
不详的，鲜为人知的
used to refer to someone or something about which little is known
The English king, Arthur, is a somewhat shadowy figure who may not have even existed. 英格兰国王亚瑟是个有些扑朔迷离的人物，可能这个人并不存在。
They are members of some shadowy extremist group. 他们是某个神秘极端主义组织的成员。