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Adam [Adam 词源字典]: Adam: Adam’s apple [18] The original apple in question was the forbidden fruit of the tree of the knowledge of good and evil, which the serpent in the Garden of Eden tricked Eve into eating, and which she in turn persuaded Adam to eat. It was traditionally believed that a piece of it stuck in Adam’s throat, and so it became an appropriate and convenient metaphor for the thyroid cartilage of the larynx, which protrudes noticeably in men.
[Adam etymology, Adam origin, 英语词源]
Adam's apple: Adam's apple: [18] The original apple in question was the forbidden fruit of the tree of the knowledge of good and evil, which the serpent in the Garden of Eden tricked Eve into eating, and which she in turn persuaded Adam to eat. It was traditionally believed that a piece of it stuck in Adam’s throat, and so it became an appropriate and convenient metaphor for the thyroid cartilage of the larynx, which protrudes noticeably in men.
noticeable (adj.): 1796, "worthy of notice," from notice (n.) + -able. Meaning "capable of being noticed" is from 1809. Related: Noticeably.
rocky (adj.): "full of rocks," c. 1400, from rock (n.1) + -y (2); "unsteady," 1737, from rock (v.1). Meaning "difficult, hard" is recorded from 1873, and may represent a bit of both.

The Rocky Mountains so called by 1802, translating French Montagnes Rocheuses, first applied to the Canadian Rockies. "The name is not directly self-descriptive but is an approximate translation of the name of the former Native American people here known as the Assiniboin .... The mountains are in fact not noticeably rocky" [Room]. Bright notes that "These Indians were called /assiniipwaan/, lit. 'stone Sioux', by their Cree (Algonkian) neighbors".