Sindarin 

nind

thin

1) nind (slender, fragile); no distinct pl. form. 2) *lhain (lean, meager), lenited ?thlain or ?lain (the lenition product of lh is uncertain), pl. lîn. Suggested Sindarin form of ”Noldorin” thlein*, corresponding to archaic Sindarin lhein**, later *lhain.

nind

thin

(slender, fragile); no distinct pl. form.

lhain

thin

(lean, meager), lenited ?thlain or ?lain (the lenition product of lh is uncertain), pl. lîn. Suggested Sindarin form of ”Noldorin” thlein, corresponding to archaic Sindarin ✱lhein, later ✱lhain.