In 300 words or less, use dictionary. com to identify the language of origin and the word parts, including what they mean, for the word enigma.

Enig-ma

The word enigma had its first known use in the mid 16th century, used as a noun to refer to a person, thing or situation considered obscure or concealed/unknown.

As is the case with more than 50% of English words, which have either Latin or Greek roots references, enigma has two root references. The word aenigma from the Latin language, means riddle and from the Greek word ainigma obtained from the word ainissesthai which means to speak in riddles derived from ainos  - fable.

Prefix:

In this case there is no identifiable prefix.

Suffix:

A letter or group of words that when placed after the main word changes it meaning or gramatical function.

-ma is related to -ment (Middle English) concrete result of something... from the same  Greek noun suffix - mat / -ma

i think the life is invaluable.

you can also say immeasurable.