The prefix morph- means shape. So, to "morph" literally means to change shape. Additionally, "suffer" means feel pain; "rejoice" means celebrate, draw happiness from; "unite" means bring together, join, connect; "preach" means deliver a speech to a group of people, particularly a religious message. 

The prefixes con-, and com- mean with, together. As in "convene," which means meet, come together to discuss. So, "compact" means something like pushed together or "dense." If you need further help, "dense" means thick, tightly packed together.

The prefix re- means back or again. As in "respond," which means say something back, in reply. So, "reflect" means to think back on. This is closest in meaning to "consider." Additionally, "supplant" means replace; "discuss" means talk about; "acknowledge" means recognize, notice. 

The prefix fore- means before. As in "forerunner," which means something that comes before something else. So, to "foretell" means to predict, to warn. All the other answer choices are things you do after an event. So, for example, "revert" means to change back to an earlier state.

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.