Opposition
Opposite
noun, な adjective, の adjective, verbal noun
The anti versus... You'd think this would be a double negative, but it's like a lot of other words where you have two similar words combined... it just means the same thing as those two words. In this case, the anti-versus of something would be the opposite. Alternatively, it can be the opposition. You choose.
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.
反対にする
to reverse something
反対に見える
to look like the opposite, to have something look backwards
反対になる
to become the other way around
反対向き
facing the opposite direction
反対回り
turning in the opposite direction
反対方向
the opposite direction
反対の声
voices of opposition
反対の方向
opposite direction
反対の手
opposite hand
その考えには反対です。
I’m opposed to the idea.
あの、そのサンダル、右と左が反対ですよ。
Um, your right and left sandals are on opposite feet.
父は、私がウォルマートでプロポーズすることを反対した。
My father was opposed to me proposing in a Walmart.