Have you ever seen this katakana?
What does it mean?
That's right! No シュガー! (No sugar!)
Do you know what this word means?
Have you ever heard someone say "Take care." when they are saying goodbye? This is like "気をつけて." How about "I don't care." when they are mad? This is like "関係ない."
What do you think the careless means?
Right! They are not safe or concerned. If someone is careless it's easy to have an accident or lose something.
Do you know the opposite of careless?
*I'll write it at the end of this post ;-)
I usually buy yogurt that is 無脂肪. Do you know how to say 無脂肪 in English? It's FAT FREE!
What do we call someone who is very relaxed, never worried or stressed? That person is carefree! They don't have a care in the world!
You can find many examples of English words that end in FREE or LESS. Now you can understand the meaning.
So did you guess the opposite of careless? If someone cares a lot they are careful! They are "full" of concern or full of care.
Are you careful, carefree or careless?