無作法だ

is rude

phrase Uncommon #17,855
is rude Used to describe behavior, actions, or remarks that lack good manners. 無作法な modifies a noun.
JA: 食事中に大声で話すのは無作法だ。
EN: Speaking loudly during a meal is rude.

を指差すのは無作法だ

It’s rude to point at people.

彼は無作法だが、それでも私は彼を愛する

He is rude, but I love him anyway.

彼の態度無礼とは言えない無作法だ

His attitude isn't exactly rude, but it is rather uncouth.

そんな事を言うとあなたは無作法だ

It was rude of you to say such a thing.