Today's word is the adjective MAGNUS. Its basic meaning is "great, large," along with connotations of "grand, important," etc. Note the irregular comparative forms: maior (maius) is the comparative form and maximus is the superlative.
This word can also refer to someone "great in years," so the maiores refers to the "elders, ancestors, forebears."
There are many English words that are derived from Latin magnus and its related forms: magnify, maximize, magnitude, magnificence, magnanimity, major, majesty, mayor, and magnate. The Latin phrase magnum opus is also commonly used in English! The phrase magna cum laude is also used in English.
Here are some examples of today's word in Latin sayings and proverbs; for more information, see the page at the Scala Sapientiae, which contains notes on some of the proverbs cited below, as well as additional proverbs:
Magna opera Domini.
A magnis, maxima.
Ne magna loquaris.
Vive tibi et longe nomina magna fuge.
Magna vis auri.
Magna est res scire vivere, maior scire mori.
Magnum in parvo.
Magna ne iactes, sed praestes.
Nil sine magno vita labore dedit mortalibus.
Nil sine magno labore.
Nil magnum nisi bonum.
Secunda felices, adversa magnos probant.
Adversa magnos probant.
Magna fortunae dona non sunt sine metu.
Magna vis pecuniae.
Vicinum habere malum magnum est malum.
Res est magna tacere.
Magnum magna decent.