Mask
noun
A temporary face is something you put over your face to cover it. It's a mask.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
仮面をかぶる
to wear a mask
仮面をつける
to put on a mask
仮面を外す
to take off a mask
仮面ライダー
Kamen Rider (TV series)
仮面パーティー
masquerade party
仮面家族
family that pretends to get along, The Masked Family (literature)
タキシード仮面
Tuxedo Mask (character in Sailor Moon)
月光仮面
Moonlight Mask (TV and movie superhero)
アクション仮面
Action Mask (character in Crayon Shin-chan)
ガラスの仮面
a glass mask, Glass Mask (manga series)
金の仮面
gold mask
一つの仮面
one mask
わぁ、びっくりした！何で仮面なんてかぶってるの？
Ah, you startled me! Why are you wearing that mask?
彼女は笑顔の仮面の下で、本当は泣いているのかもしれないよ。
Behind her smiling mask, she might actually be crying.
ハロウィンの日の夜、仮面ライダーのコスプレをしながら、チョコレートを一箱平らげたビエトを見ました。
On the Halloween night, I saw Viet wearing the Masked Rider costume and eating a whole box of chocolates.