ごはん

In a sentence

• 朝ごはんを食べました。

  I ate breakfast.

  In this sentence, ごはん (gohan) is combined with 朝 (asa, morning) to specifically mean 'breakfast.'

• ごはんが炊けたら教えてください。

  Let me know when the rice is cooked.

  Here, ごはん (gohan) is used to refer to 'cooked rice,' which is common in Japanese cuisine.

• おばあちゃんの作るごはんはとてもおいしい。

  The meals my grandmother prepares are very delicious.

  In this context, ごはん (gohan) broadly refers to 'meals' or food in general, not specific to rice.