The prefixes bi- and di- mean two. As in, "biweekly" which means happening every two weeks. "Diverge" means split, separate and go in different directions. It helps to think of it like "diverge" = to go in two different directions. Additionally, "remain" means stay; "spoil" means ruin; "preserve" means maintain, save something for future use; "instruct" can mean either order, tell or teach, educate. 

The prefix chron- means time. So, a "chronicle" is a record of events that have happened over time. Additionally, "amuse" means entertain, make laugh; "scatter" means spread out; "reproduce" means make another copy of or produce a child; "rush" means force something to happen too quickly.

The prefix a- means not. So, "atypical" means not typical, not normal, uncommon. Additionally, "tightfisted" means not generous with money, not likely to spend money; "earsplitting" means deafening, extremely loud; "gullible" means easily tricked into believing something, easily lied to; "roomy" means spacious, containing lots of room.

The prefix commu- means share. As in, "community" or "communism." So, "communal" means shared among a group. Additionally, "tender" means soft and delicate, caring; "remorseful" means feeling sorry for a wrongdoing; "vulgar" means rude and tasteless, lacking class; "efficient" means able to work quickly and correctly.

The prefix acro- means high. As in, "acropolis" which means city or building on a hill above a larger city. So, an "acrobat" is a high-flyer, otherwise known as a "gymnast." Additionally, an "omen" is a sign that warns about the future; a "chef" is someone who cooks food professionally; an "academic" is a scholar, someone who studies and teaches at a university; an "engineer" is someone who designs things for construction.

The prefix vol- means will. "Will" when used as a noun refers to a person's ability to do what they want to do. So, someone with "free will" is in control of his or her own life and can do what he or she wants to do. So, "voluntary" means done of one's own free will, optional, chosen. Additionally, "innocent" means not guilty; "invincible" means unstoppable, unable to be defeated; "scarce" means rare, in short supply; "sore" means in pain, hurting. 

The prefix ultra- means above, beyond. As in, "ultrawide" which means very wide, beyond wide. So, "ultrasensitive" means very sensitive, beyond sensitive. This is closest in meaning to "delicate." Additionally, "temporary" means not permanent, not long-lasting; "swift" means quick, rapid; "fretful" means worried, upset, distressed; "vigorous" means healthy, strong, fit.

The prefix sub- means below. As in, "submarine" which is a ship that moves below the water. So, "subpar" means below average, of poor quality. You may have heard the word "par" used before to refer to average (such as in golf). Additionally, "grand" means great and spectacular.

The prefix agon- means pain. As in "agonize" which means to stress and feel pain over a decision. So, "talent" is ability, skill; "humility" is modesty, lack of arrogance; "matrimony" means marriage; "integrity" means honesty, the quality of having strong principles. 

The prefix uni- means one. As in, "unicyle" which is sort of like a bicycle, but with one wheel. So, "universal" means the same everywhere, worldwide. It helps to think of it like this "universal" = one thing that is the same everywhere. Additionally, "regional" means local, found in one region; "illegal" means against the law; "adamant" means determined, refusing to change one's mind; "inconclusive" means not leading to a definite conclusion.