sen-, sene-, seni-, sir-

1. A condition in which a person is growing old without the usual signs of aging: "Someone guessed the age of a man at a fitness studio to be in his 40s; however, because of his insenescence, he was actually in his 70s."

"The conference speaker met a ninety-two-year old woman which he guessed to be about seventy, based on her energy as well as her appearance; however, he learned that there was a great discrepancy between her chronological age and her apparent biological insenescence."

2. The process of getting old, becoming elderly, or approaching old age: "In the Oscar Wilde story, Dorion Gray, the main character fears insenescence and swore that he would always be young and handsome."

"The university set up a department to study insenescence because there are many more in the general population who are getting old."

A description of someone who is growing old without showing the usual signs of aging: "Even though her insenescent uncle is 95 years old, he looks more like someone who is about 65."

The onset of the characteristics of old age at an earlier than normal time in a person's life: "Her father who was only in his 40s had to be moved into a nursing home as a result of his premature senility because he couldn't take care of himself anymore and he needed more attention than his family could provide."

Mental disorder(s) which may be associated with aging; such as, the inability to deal with social situations or showing signs of behavioral disorders: "The doctors on the ground floor of the hospital were trained to work with aging persons who were afflicted with psychosis of senilities."

1. A man of rank; such as, a feudal lord, especially in England (from Latin senior, "older"): "In some of the novels by Sir Walter Scott, many of the seigniors owned vast lands and forest areas."

"The seignior had asked for an audience with the king to discuss some local economic improvements."

2. Used as a form of address for such a man: "When coming to the great hall, the knights saluted the seignior who was the lord and a person of rank and respect."
3. Etymology: from Middle English segnour, from Old French seignor, from Vulgar Latin senior, from Latin, "older"; comparative of senex, sen-, "old".

A source of revenue for a government which is based on the difference between the price of the bullion used, minting costs, and the value of the coin minted: "The authorities of the country included the annual seignorage when they were calculating the budget for the upcoming year."

1. The power or authority of a lord: "The seignory of the lord included both land and sea responsibilities."
2. Etymology: from French seigneur, "lord"; Latin, "senior, elder", in English law, "the lordship".

The rule or government of elders: "The aging senator presided over the senarchy in a benevolent manner."

1. In a bicameral form of government, the upper law-making chamber of government in many countries or states, past and present: "His uncle was elected to the senate where he distinguished himself with his pro- environmental voting record."
2. Often the governing body or officials at a university: "The popular professor was elected to the university senate."
3. Etymology: via Old French from Latin senatus, literally "assembly of elders", from senex "male elder"; source of English senile and senior.

1. An elected or appointed member of the upper house of a bicameral form of government: "There will be ten senators running for re-election to the U.S. Senate in the summer."
2. The members of a governing body at a university: "The school senators agreed with the students’ demand for more classes."

1. Relating to or characteristic of a member of an upper governing body: "As a new senator, she was granted senatorial privileges."
2. A reference to those who are part of an upper legislative group: "The university students were invited to visit their state senators in their senatorial offices."

A custom in which presidential appointments are confirmed if there is no objection to them by the two senators from the appointee's state: "The president’s choices of a federal district court judge, a U.S. attorney, and a federal marshal for the two senators' state was approved via the process of senatorial courtesy because there was no objection to the appointees."

In Roman law, a decision or decree of the governing Roman chamber of government, that had the force of law, but it was made without the concurrence of the people: "The senators agreed to a senatus consultum in order to expedite action regarding the national debt."

"In modern times, a decree is a legally binding command or decision entered on the court record that is issued by a court or a judge, as opposed to the practice of senatus consultum in which a small group of law makers consulted and issued decrees that became the law of the land."

The Senate and the People of Rome.

"The initials SPQR appeared on many ancient official standards (flags) and emblems and they still exist on manhole covers in modern Rome."

"The edict issued by the emperor in ancient Rome applied both to the senatus populusque Romanus, or the senators and the citizens of the city of Rome."

"During a visit to the city of Rome, the tourist noticed the mark, SPQR (Senates Populusque Romanus), on several municipal features including light posts and man hole covers."

Elderly, characterized by being advanced in age: "Despite the senectitude of his aunt, she was a marvelous pianist and practiced regularly."