ʿanbar

The Arabic word ʿanbar (عنبر) originally referred to ambergris—a waxy, fragrant substance produced in the intestines of sperm whales and found floating in the ocean or washed up on shores. Ambergris was extraordinarily valuable as a perfume fixative and was worth more than gold in medieval markets.

When Arab traders also dealt in the golden fossilized tree resin that we now call amber, the two substances became confused. Both were found on beaches, both were precious, both were mysterious in origin. European languages borrowed ʿanbar for the resin, and the original meaning (whale product) was gradually distinguished as ambergris—French ambre gris, 'grey amber.'

The tree resin amber had been valued since the Stone Age. Baltic amber—fossilized pine resin up to 50 million years old, sometimes containing perfectly preserved insects—was traded along routes stretching from the Baltic to the Mediterranean. The Greeks called it ēlektron, which gave us the word 'electricity' (because rubbing amber generates static charge).

So amber connects three great etymological threads: Arabic perfume trade, Baltic prehistoric commerce, and the discovery of static electricity. A single word bridges whales, trees, and lightning.