• 頂上ちょうじょう — summit
• 頂点ちょうてん — peak, apex
• 山頂さんちょう — mountain top
• いただきます — expression of gratitude before meals
• 頂戴ちょうだい — please give (humble)

頂 combines the radical 頁 (head) with the phonetic 丁 (テイ), giving the image of “the top of the head.” This evolved to mean “summit” and also “to humbly receive something from someone above.”

山やまの頂上ちょうじょうに 登のぼりました。
I climbed to the summit of the mountain.

この本ほんを 頂いただきました。
I received this book (humbly).

As an on-yomi, 頂 is read チョウ in compounds like 頂上ちょうじょう. The kun-yomi いただく is used in respectful language.