Rudeness, Impoliteness
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 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.