tengwa (pl. tengwar is attested) (1) noun "letter" Tengwa (ñ) is defined as "any one visible sign representing (theoretically) any one audible teñgwe" (phoneme) (VT39:17). In non-technical usage tengwa was equivalent to "consonant", since only the consonants were full signs (WJ:396, TEK). In the Etymologies, tengwa was apparently emended from tengwë (VT46:17).
Quenya
sarat
letter
sarat
noun. letter (of the Rúmilian alphabet)
tengwa
letter
sarat (pl. sarati given) noun "letter", any individual significant mark, used of the letters of Rúmil after the invention of Fëanor's tengwar (WJ:396). Cf. sarmë.