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navel; belly button
protrusion or depression in the middle of an object
center; centre; most important part; main point
赤ちゃんのへそを見るとかわいいと思う。
I think it's cute when I see a baby's belly button.
夏になるとへそが見える服を着る人が増える。
In summer, more people wear clothes that show their navel.
へそのゴマを取るのは痛いからやめた。
I stopped removing belly button lint because it hurts.