pilind (no plural form)
variant pilinn
later variant pilin

arrow

With singular and plural “the”, showing Soft and Nasal mutations:
i bilin “the arrow”
i philin “the arrows”

based on Quenya pilin(di) 'arrow' (Ety382)

Noldorin hwand 'fungus' versus Quenya hwan(di) 'fungus' (Ety388)

David Salo