(Derogatory) An ordinary person, especially one from the lower social classes.
Mid 17th century: originally as plural plebs, from Latin plebs the common people. Later a shortened form of plebeian.
“Due to the mix up we plebs got to mingle with the hoity-toity in the VIP area.”
“He considers everyone outside his social circle to be plebs and incapable of rational thought.”
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