What is Ambergris

Ambergris (/ˈæmbərɡriːs/ or /ˈæmbərɡrɪs/, Latin: Ambra grisea, Ambre gris, ambergrease or grey amber) is a solid, waxy, flammable substance of a dull grey or blackish colour produced in the digestive system of sperm whales.

The word amber is derived from the Arabic word 'anbar'

Freshly produced ambergris has a marine, faecal odour. However, as it ages, it acquires a sweet, earthy scent commonly likened to the fragrance of rubbing alcohol without the vaporous chemical astringency.

Although ambergris was formerly highly valued by perfumers as a fixative (allowing the scent to last much longer), It has now largely been replaced by synthetic ambroxan.

Source: https://en.wikipedia.org/wiki/Ambergris