Common terms:
* Drwg: This is the most common and general word for "bad."
* Gwael: This means "bad" in a sense of being of poor quality or inadequate.
* Difyg: This is a more specific term for "bad" meaning "lacking" or "deficient."
* Cas: This implies "bad" in a negative or hateful sense.
* Amh: This means "bad" in a sense of being wrong or incorrect.
Other options:
* Anghywir: This means "wrong" or "unjust" and can be used to describe something that is morally bad.
* Gwaetha: This means "worse" and can be used to describe something that is particularly bad.
The best way to translate "bad" depends on the context of the sentence.
Here are some examples:
* Mae'r tywydd yn drwg heddiw. (The weather is bad today.)
* Mae'r ffilm hon yn wwael. (This film is bad.)
* Mae gen i ddifygniad o arian. (I am lacking in money.)
* Mae'r bwyd yn gas. (The food is disgusting.)
* Mae'r ateb yn amh. (The answer is wrong.)
* Mae'n anghywir i ddwyn. (It is wrong to steal.)
* Mae'r sefyllfa yn waetha nag erioed. (The situation is worse than ever.)