Undecimus.
Undecimo die.
Masculine: Undecimus Feminine: Undecima Neuter: Undecimum
The Latin word for 'eleven' is undecim. For 'eleventh' use undecimus.
ante diem tertium Idus Sextilis, which can be abbreviated to a.d. III Id. Sex.
The name of the eleventh month, November, is derived from the Latin word novem, meaning nine.
"eleventh".
No
November 11th at 11am.
The Armistice , the eleventh hour, of the eleventh day ,of the eleventh month
Armistice Day.
one eleventh pus two eleventh
it was the tretey that ended WW1