And
From Tolkien Gateway
And means 'long'.
It was simplified to just an- in compounds
Etymology
Possibly Old Sindarin *anda < root ANAD.
Examples
- Androth: 'Long delving'
- Anduin: 'Great River' (in this case, great is used for long)
- andaith: 'long mark'
- Anfalas: "Langstrand"
- Ann-thenaith