Inciting or causing people to rebel against the authority of a state or monarch.
Late Middle English: from Old French seditieux or Latin seditiosus, from seditio ‘mutinous separation’ (see sedition).
“He read the letter and instantly declared it seditious!”
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