Use the dictionary checker to see if the word is valid.
In addition, it helps you quickly find out what the meaning of the word to look up is.
Is it a noun, verb, or adjective... The word will be translated in a reasonable context.
You want to check the word "happy", type the word "happy" in the input box, then click "check". You will get results like the image below:
Very simple and useful, right? Use it often!