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rough; careless; slovenly; slipshod; rude; impolite
彼はぞんざいな態度を取って謝らなかった。
He took a careless attitude and didn't apologize.
ぞんざいな扱いを受けて腹が立った。
I was angry at receiving rude treatment.
大切な客にぞんざいな返事はできない。
You can't give rude replies to important customers.