Rudeness, Impoliteness, Excuse Me
Noun, する verb, and な adjective
しつれい
失礼ですが、日本ごははなせますか。
Excuse me, but can you speak Japanese?
じっさいの会話で「あなた」という言ばを使うと、失礼にきこえることが多いです。
If you use "anata" in an actual conversation, it often sounds impolite.
もし私があなたに太いと言えば、失礼だと思いますか？
Would you think I’m rude if I told you that you’re fat?
When you do something that's your fault and then you say "thanks" after you do it, that's super-duper rude, wouldn't you say? Imagine doing something like this and then thinking to yourself after... wow, I was really rude.
This is also often used to mean excuse me, in which case it's usually followed by ですが or します. In casual situations, though, it's sometimes used on its own.
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.