Confession
noun, verbal noun, の adjective
To announce something and make it white is to make a confession. Think of a completely blank sheet of paper - your confession clears all the announcements from the sheet of paper, making it white.
This word is often used when someone confesses romantic feelings for someone else.
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.
「どうして告白にそんなに時間がかかったの？」「告白の仕方が分からなかったんだ。」
"Why did you take so long for the confession?" "Because I didn't know how to do it."
ジャマルはずっとドラクエファンだと公言していたのに、最近ついにファイナルファンタジーのかくれファンだったことを告白した。
Jamal has been publicly declaring that he is a fan of Dragon Quest, but recently, he finally confessed that he is a secret admirer of Final Fantasy.
会計事務所でのアシスタントの仕事を得た後に、彼女は実は数学があまり得意ではないことを告白した。
After getting an assistant position in a finance office, she confessed that she is actually bad at math.