The prefix arm- means weapon, war. As in "disarm," which means to make safe, to take a weapon away from. So, "arms" are weapons or weaponry. Additionally, "society" is the name given to a group of people; "philosophy" is the study of the essential nature of things, literally the love of wisdom; "anatomy" is the area of science that studies the body structure of living beings.

The prefix therm- means hot, heat. As in "thermometer," which is something used to measure temperature. "Thermal" means related to heat, so the best answer choice here is of course "heat." Additionally, "mass" refers to the weight of something (in the science classroom the definition is a little more complicated, but for the purposes of practical vocabulary "mass" and "weight" are the same). Finally, "velocity" refers to speed. 

The prefix cred- means believe. As in "incredible," which literally means unbelievable, too amazing to be easily believed. So, a "creed" is a belief. Additionally, "empathy" is the ability to feel what others are feeling; "apathy" is not caring; "naivety" is believing everything, being too easily convinced by others; your "reputation" is what others believe to be true about you, how others think of you.

The prefix port- means carry or move. As in "transport," which means to move from one place to another. So, a "porter" is a carrier, someone who carries something. Additionally, a "miser" is someone who is not generous with money; a "mentor" is someone who guides someone else.

The prefix pro- means forward. So, to "prolong" means to extend, to extend something forward into the future. Additionally, to "discover" means to find; to "offend" means to upset someone, to cause anger; "menace" means threaten, scare; to "retire" means to stop doing something, often to stop working.

The prefix scrib- means write. As in "scribe" which means writer. So, "scribble" means to doodle, to write messily. This is, of course, closest in meaning to "write." Additionally, "complete" means finish; to "intend" means to mean to do, to deliberately do.

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.