Being blunt or presumptuous; lacking restraint or politeness and behaving or speaking in a forward, rude way.
彼は無遠慮に意見を言って場の空気を壊した。
He spoke his mind bluntly and ruined the atmosphere.
無遠慮な態度は時に人を傷つけることがある。
A presumptuous attitude can sometimes hurt people.
初対面で無遠慮に頼むのは失礼だ。
It's rude to ask for things so bluntly when you first meet someone.