This is the 7875th most frequent Chinese word.
面具
Mask.
In this sentence, '面具' is used to refer to a literal mask or face cover, often decorative or functional.
他戴上了一个精美的面具。
He put on an exquisite mask.
'面具' here metaphorically describes an emotional barrier or a pretense hiding true feelings.
她的笑容不过是一种面具，掩饰了内心的情感。
Her smile is merely a mask, concealing her inner emotions.
In this sentence, '面具' is used to describe masks or disguises for a themed event, like a masquerade.