Be Careful in Quenya

Hi, Anyone know how to say "be careful" or something similar in Quenya?

so I have na for "to be" in Quenya, but I could only find "careful" in Sindarin as idhrin. Can I just use the Sindarin version of "careful" then because I can't find anything else? Then it would be na idhrin if I'm correct.

You should not mix Sindarin and Quenya words, they are separate languages. It's like mixing English and Greek in the same sentence...

(Also idhrin in Sindarin does not mean "careful", don't know where you saw that; it means "year".)

There is no attested way for saying "be careful". This is a rather idiomatic expression that is realised in many different ways in different languages, so merely translating "be careful" word-to-word would almost certainly sound like an anglicism. But since I don't have any better ideas at the moment, I'll offer na tiríte! for now.

I just saw that it was idhren and not idhrin lol

Also thanks for your help, really appreciate it

Idhren means "pondering, wise, thoughtful" :D