Я хочу ещё кусочек арбуза.

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Breakdown of Я хочу ещё кусочек арбуза.

• хотеть: to want
• ещё: another
• арбуз: the watermelon

Questions & Answers about Я хочу ещё кусочек арбуза.

Why is арбуза in the genitive case instead of арбуз?

Because кусочек арбуза means a little piece of watermelon or a piece of watermelon.

In Russian, after nouns that indicate a part, amount, or piece of something, the thing itself is often put in the genitive case:

• кусочек арбуза = a piece of watermelon
• чашка чая = a cup of tea
• бутылка воды = a bottle of water

So арбуз becomes арбуза because it depends on кусочек.

Why is кусочек used here instead of кусок?

Кусочек is the diminutive form of кусок.

• кусок = a piece, a chunk
• кусочек = a little piece, a small piece

Russian uses diminutives very often, not only to mean physical smallness, but also to sound:

• softer
• friendlier
• more natural in everyday speech

So Я хочу ещё кусочек арбуза sounds very natural, like I want another little piece of watermelon or simply I want some more watermelon in a friendly everyday way.

What exactly does ещё mean here?