tummy

1. N-COUNT Your tummy is the part of the front of your body below your waist. Tummy is often used by children or by adults talking to children. 肚子 (兒童化用語)

Your baby's tummy should feel warm, but not hot. 你寶寶的肚子摸起來應該是溫的，而不是熱的。

2. N-COUNT You can use tummy to refer to the parts inside your body where food is digested. Tummy is often used by children or by adults talking to children. 胃 (兒童化用語)

I've got a sore tummy. 我胃痛。

...a tummy ache. …胃痛。