This is the 4189th most frequent Japanese word.
不用意
"不用意" means "carelessness" or "unpreparedness."
The word 不用意 is used here to denote 'carelessly' or 'without caution,' emphasizing actions taken without thoughtful consideration.
不用意に発言すると、人を傷つけることがあります。
If you speak carelessly, you might hurt others.
In this sentence, 不用意 is used to describe behavior that is 'unprepared' or 'careless,' highlighting the importance of being cautious and deliberate.
不用意な行動は事故の原因になります。
Careless actions can be the cause of accidents.
Here, 不用意 refers to the act of opening the door 'without prior thought or caution,' illustrating a lack of attentiveness or preparation.