la sandía in English:

Have you bought a watermelon?

Watermelon tastes delicious on a hot day.

I like to eat watermelon.

This is a kind of watermelon.

A cucumber is related to a watermelon.

The watermelon is the best for hot days.

Not all the watermelons are sweet.

I love eating fresh watermelon in the summer.

l.m.: watermelons

Let's eat a watermelon!

Tomorrow I'm going to throw a watermelon off the roof of a five-story building just for the hell of it.

I've never seen such a giant watermelon!

I never seen such a big watermelon before.