NaCl — Sodium Chloride: a white, crystalline substance with a characteristic taste.

• That which purifies, preserves, or corrects
• That which gives a tang or piquancy to anything
• Sharp, pungent humor or wit
• A veteran sailor; ‘an old salt’
• Taste, relish, smack
• To give artificial value to; specifically a) to alter books, prices etc b) to scatter minerals or ores in a mine to deceive perspective buyers etc.
• To give salt water to drink: a way of initiating formerly existing in English universities
• Covenant of salt: a covenant or compact entered into at a sacrificial ceremony in which salt was used as a necessary element
• Not worth one’s salt; not worth one’s wages, sustenance etc.
• Salt of the earth; any person or persons regarded as the finest noblest, etc
• Salt of Venus; in old chemistry, copper sulfate
• With a grain of salt (Latinized cum grano salis) with allowance or reserve; skeptically.