This is the 7057th most frequent Japanese word.
ライチ
Lychee.
In this sentence, 'ライチ' is used to refer to the fruit itself, treating it as a subject of the sentence.
ライチは甘くてジューシーな果物です。
Lychee is a sweet and juicy fruit.
Here, 'ライチ' is used to refer to the fruit in its plural form, as items appearing at the market.
夏になるとライチが店頭に並びます。
Lychees appear in stores during summer.
In this sentence, 'ライチ' is denoting specific lychees, asking about their origin.