海(hǎi)
 
字形:
“海”是由“水”和“每”组成的字。“每”在上古时期,用来指氏族社会中年龄最长、生育儿孙最多的女性。把“水”和“每”放在一起就表示“海”指水最多的地方。
The character "海" is composed of "氵" (indicating water) and "每". "每" was referred to female who was the oldest and had the most offspring in ancient society. Thus, by combining "氵" and "每" together,  "海"indicates the place with the most water.
 
字义:
sea; ocean
 
组词:
大海(dàhǎi):sea; ocean
海洋(hǎiyáng):seas and oceans; ocean
海岛(hǎidǎo):island (in the sea)
海边(hǎibiān):seaside
海鲜(hǎixiān):seafood
海啸(hǎixiào):tsunami
 
例句:
Wǒ xǐhuan zài dàhǎi lǐ yóuyǒng.
1、我喜欢在大海里游泳。
I like swimming in the sea.
Wǒmen yīnggāi bǎohù hǎiyáng zīyuán.
2、我们应该保护海洋资源。
We should protect ocean resources.
Dìzhèn yǐnqǐ le hǎixiào.
3、地震引起了海啸。
An earthquake triggered the tsunami.