This compound contains a sulfhydryl group.

Kazumi is my best friend.

I have been to Suishiei.

Water Margin is one of the four great literatures of China.

I buy water at the water store every day.

Groundwater pollution has become a serious environmental problem.

I saw various aquatic creatures at the aquarium.

Seeing his failure, she felt schadenfreude.

He crossed many mountains and rivers to meet her.

Please remember this old proverb, 'The friendship of a gentleman is insipid as water.'