antecedent

antecessor

antechamber

antechoir

antedate

antediluvian

antefix

antemeridian

antemortem

antenatal

antependium

antepenult

antepenultimate

anteroom

antetype

antevert

Antedate- a date assigned to an event or document earlier than the actual date of the event or document

Antecedent- a substantive word, phrase, or clause whose denotation is referred to by a pronoun

Antediluvian- of or relating to the period before the flood described in the Bible

antebellum means before the civil war. the antebellum south, or an antebellum mansion

anetpenultimate means 3rd from the end. ultimate is last, penultimate is 2nd to last, antepenultimate is 3rd from last.

and of course AM, as in 9:00AM, means ante meridian, before noon.

and i did not look any of those us, unlike some OTHER answerers. they came from my head. so i think i should get the best answer.