sane
UK: seɪn | US: seɪn
adj. mentally sound; free from mental disorder
adj. rational; showing good judgment
The word "sane" traces back to the Latin sanus, meaning "healthy" or "sound." It entered English via Old French sain in the late 14th century, initially describing physical health before shifting to mental soundness by the 17th century. The root reflects a broader Indo-European concept of wholeness and balance, linking to words like "sanitary" and "sanity." Unlike compound words, "sane" is monomorphic—its core meaning remains intact without additional affixes.
The court declared him sane and fit to stand trial.
Her advice was always sane and practical.
Despite the chaos, he remained remarkably sane.
A sane person would avoid such reckless behavior.
The policy reflects a sane approach to environmental issues.