μυρίων [1 verses]( adj pl masc gen) "Ten thousand" is myrios, which means (of Number) "numberless," "countless," "infinite," (of Size) "measureless," "immense," "infinite," (of time) "incessant," (as a definite number)"ten thousand," and as an Adv. "immensely," "incessantly." It is not from the Greek numbers (10-theka, 1,000=chilia).  - The word translated as "ten thousand" is primarily used generally to express immense and even infinite amounts. It is not from the Greek numbers for "ten thousand," but it came to means that as a definite number.