Senectitude (noun)
sen-ek-ti-tood
The last stage of life; old age.
Senectitude comes from the Medieval Latin noun senectitūdō meaning “old age,” which in turn comes from Classical Latin senectūs, a derivative of the noun senex meaning “old man.” Senectitude entered English in the late 1700s, more precisely, in 1796 in Jonathan Swift’s Gulliver’s Travels
Example sentences
“As he reached his senectitude he realised it had been a good life.”

Soigné (adj) swahn-yay Carefully or elegantly done, operated, or designed First recorded in 1915–20. Borrowed directly from French; originally from soin, meaning “care.” (more…)