closeted
adjective uk/ˈklɒz.ɪ.tɪd/ us/ˈklɑː.zət.ɪd/
(SECRET)
（同性恋）保密的，不为人知的
A closeted gay man or woman keeps the fact that he or she is gay secret from most people.
a closeted professional football player 一名隐匿同性恋身份的职业足球运动员
（活动或观点）不为人知的
used to describe an activity or opinion that someone keeps secret
closeted political dissent 不为人知的政治观点分歧
(STAYING INDOORS)
（因工作等）闭门不出的
If someone is closeted somewhere, they stay there, often because they are working hard on something.
She is currently closeted at home working on her new book. 她目前闭门不出，在家写一本新书。