The words representing freedom can be "freedom" in English, Latin and various other languages. In fact, the word itself is very powerful and small. It's very suitable for people who have never had a tattoo to try it for the first time. If you think that a word is too simple, you can also choose the proverbs, poems, etc. related to "freedom"; in this way, the area will be slightly larger, which is also elegant.
Birds are usually representatives of freedom, which should be easy to think of. Some birds may have other special meanings, such as pigeons for peace and eagles for independence. If you only want to express "freedom", you can choose birds with "no obvious other meaning", such as ordinary small birds, as long as you emphasize the characteristics of flying.