Sub is not used as a suffix it is used as a prefix.
As I was taught sub means under or below like in subway. The way is under the city.
under
below
less than
It is from Latin
sub means "under"
it means to go under water - to submerge
under
Substitute
Sub rosa, meaning "under the rose."
Sub- sub, meaning under mit- mitto, mittere, mitti, misus, meaning to send
The root-word for submerge is the prefix sub. The prefix meaning under and beneath.
The word "submarine" simply means "under the sea". (Sub meaning below, marine meaning sea)
Subterranean means occurring or existing beneath the surface of the earth. In this case, "sub" means under and "terra" refers to earth or land. So, subterranean literally translates to "under the earth."
There are two commonly used: "sub-" and "under-" itself. e.g. "substandard", "subway", "subordinate" etc. "understatement", "underpass", "underwear" etc. "sub" is the Latin word for "under".
The word cell "Sub" means under.
Subterranean is Latin in origin: from "terra" meaning earth, and the prefix "sub-" meaning under. Thus, subterranean means, "under the earth," or hidden.
Under, Below
The prefix sub- means under. In this word it roughly means the under way.
Prefixes occur as the first part of a word, such as the prefix "bi" meaning two as in bicycle and bicarbonate or the prefix "sub" meaning under as in submarine or submit.
Sub means smaller or under.