This is the 2350th most frequent Japanese word.
アイスクリーム
Ice cream.
Here, アイスクリーム is the object of the verb 食べる, and it refers to the dessert 'ice cream'.
アイスクリームを食べるのが大好きです。
I love eating ice cream.
In this sentence, アイスクリーム is used as the subject of the verb 欠かせない, emphasizing the seasonal association of ice cream.
夏の暑い日にはアイスクリームが欠かせない。
On hot summer days, ice cream is indispensable.
Here, アイスクリーム is part of the comparison として simile construction みたいに, illustrating the coldness of the water by likening it to ice cream.