Need
A woman who pilots a helicopter will have the insatiable need for something. She doesn't know what it is. But she needs it. And that's why she's flying around looking for it!
Picture the woman in the helicopter needing something. She's looking around. Searching. But she doesn't know what it is!
よう
い, かなめ
None
Finally she knows what she needs! It's yogurt (よう)! Delicious, creamy yogurt!
What does she need? Yogurt!