曖昧關係

shady relationship / affair / adulterous relationship

(of daylight) dim / obscure / clandestine / dubious

vague / ambiguous / equivocal / dubious

to conceal / dark

mountain pass / to close; to shut; to turn off / to confine; to lock (sb) up; to shut (sb in a room, a bird in a cage etc) / to concern; to involve

relation / relationship / to concern / to affect / to have to do with / guanxi / CL:個|个[ge4]

to connect / to relate to / to tie up / to bind / to be (literary)