"A shark."

Translation: Siarc.

[Teresa624701]

Getting fed up with having my answers marked wrong because I hadn't been taught the alternatives - morgi (and gwdihw)

[EllisVaughan]

If your answer are correct Welsh words then report that your answer should be accepted.

[Limbo63]

If I'm not mistaken, OP is referring to multiple choice exercises, where you are asked to 'select all correct answers' and penalised for not knowing alternatives.