_adj. _used in sense 'bad' of food etc., putrid. Tolkien seems to have rejected the root SAWA, noting: "No. THAW-, cruel. saura, cruel. Gorthaur-."
Sindarin
saur
adjective. bad (of food), putrid
saur
adjective. used in sense 'bad' of food etc
hû
hound
_ n. Zoo. _hound. Q. hú. The gloss might be 'heat'.
huar
noun. hound, wild dog, wild dog
An adjective meaning “bad (of food), putrid” in Definitive Linguistic Notes (DLN) from 1959 based on the root √SAWA “disgusting, foul, vile” that was the basis of the (Quenya) name Sauron (PE17/183). In a marginal note Tolkien said “No. THAW-, cruel. Saura, cruel”, apparently rejecting this etymology, but then he wrote an “X” next to the marginal note (PE17/184).
Conceptual Development: The Etymologies of the 1930s had N. thaw “corrupt, rotten” under the root ᴹ√THUS, also connected to the name Sauron (Ety/THUS).
Neo-Sindarin: For purpose of Neo-Sindarin, I think saur “putrid” and thaw “corrupt” can coexist.