Gwaith-i-Mírdain

noun. people of jewel-smiths

gwaith (“people, folk”) + in (pl. genitive article) + mîr (“jewel”) + tain (pl. of tan “maker, smith”)

gwaith-i-mírdain

proper name. People of the Jewel Smiths

The Elves in Eregion led by Celebrimbor in the Second Age, translated “People of the Jewel Smiths” (S/286). This name is a combination of gwaith “people”, the elided plural definite article of i “the” and the plural of otherwise unattested mírdan “jewel smith” (SA/gwaith, mîr).

Elements

Word	Gloss
gwaith	“people; region, people, [ᴱN.] men, folk; [N.] manhood; man-power, troop of able bodied men, host, regiment; [S.] region”
i	“the”
mírdan	“jewel smith”

Gwaith-i-Mírdain

Gwaith-i-Mírdain

Gwaith-i-Mírdain means "Brotherhood of Jewel-smiths" in Sindarin (from gwaith = "host, people" and mírdain = "jewel-smiths").