The prefix meaning one, or single, is uni, as in a unicycle, which has only one wheel. Bi means two, as in a bicycle, which has two wheels. Tri means three, as in a tricycle, which has three wheels. To take it one step further, quad means four, as in a quad cane, which is a walking cane with four legs.
Does prefixes mean to or toward. One common word with this prefix is about.
one- unique- single- simple-
The mean of prefixes for beneficial is "having a good effect or favorable result."
Two prefixes that mean "cut" or "cut out" are "dis-" and "ab-".
Both of does prefixes mean not. In this case, these prefixes make words the opposite of what they mean.
What do not mean in a prefixes
Counter
Super or supra.
The prefixes il, im, and ir all mean "not" or "opposite of." They are used to negate the meaning of the base word that follows them.
Dis means away
One new word that can be made by adding prefixes and suffixes to "defense" is "redefense," which could mean to defend again or reinforce a defensive position.
inpolite