pethas (plural pethais, archaic plural petheis)

sentence, phrase

With singular and plural “the”, showing Soft and Nasal mutations:
i bethas “the phrase”
i phethais “the phrases”

Sindarin noun peth “word” (Ety366, LotR/II:IV, RS463, PE17:46) and abstract suffix -as as found in words like sarnas “a pile of stones” (LR406)

sarnas “a pile of stones” (LR406)

gwabeth: 'sentence, phrase'

Fiona Jallings, a.k.a. 'dreamingfifi' Merin Essi ar Quenteli! - Wordlists - Reconstructed Sindarin