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.
"Mono" can be used as prefix which gives the meaning as one.
Uni
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."
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
Super or supra.
Counter
The prefix "cirro-" refers to high-altitude clouds, specifically cirrus clouds. The prefix "alto-" refers to middle-altitude clouds, specifically altocumulus and altostratus clouds.
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.
Rodepertus is a Latinized form of the Old High German name Hrodberht, which means "bright fame" or "glorious shining." It is a masculine given name of Germanic origin.
Dis means away
Two prefixes that mean "cut" or "cut out" are "dis-" and "ab-".