Pearl
1. Greek: illuminate. Sindarin: (to shine) Síla; (shine) Sílad; fem. Síladeth
2. Latin: pearl. Sindarin: (white jewel) Mírfain, Nimmir; {obsolete Sindarin? *} Brithil, Brithla
* These terms are from ‘the Book of Lost Tales’, and so are possibly too old for our purposes.
3. Portugese: slow. Sindarin: (not swift) Alcheleg, Allagor