The word "incessant" means continuing without interruption. The best choice is "continuing" because it is a part of the definition of "incessant." Considering the other choices, "monetary" means pertaining to money, "clean" means unstained, and "impure" means not pure or adulterated.

“Indelible” means unable to be removed, permanent. To provide further guidance, "transitory" means not permanent or lasting; "translucent" means letting light through a little, as opposed to "opaque," which means an object that does not let any light pass through. Finally, "itinerant" means wandering, not fixed to one home or spot.

As we have previously seen ante- means before, preceding, so the correct definition of “antediluvian” is  prehistoric, literally from the time before the biblical flood. To provide further help, “postmodern” and “poststructuralist” refer to a contemporary way of looking at art and human behavior that focuses on deconstruction and self-conscious examination; a “prologue” is the beginning chapter of a story; an “epilogue” comes after the story. Make observations about the various pronouns used here, pre-, post-, pro-, epi-, and see what you can determine about how they relate to their various definitions.

The prefix post- means after, and the word “posthumous” means after death. When an award is given to someone after they have died, we say that it is awarded “posthumously.”

The prefix "ultra-" usually means beyond or extreme, and indeed “ultrasonic” means operating at an extremely high frequency. To help you, “temperature” is the numerical measurement of how warm or cool it is; “frequency” is the measurement of wavelengths or how often something occurs; and “pressure” is the measurement of a certain amount of force applied over a certain area.

The prefix "post-" means after and "mort" means having to do with death, so the word “postmortem” means after death. To provide further help, “adolescence” is another word for teenage-years. 

The prefix pre- means before, so the word “precursory” means occurring before other things, the starting point, or “initial.” To provide further help, “metropolitan” means relating to city life, diverse and multi-cultural; “covert” means sneaky or hidden; “cumbersome” means heavy or burdensome; “despicable” means evil or wicked. 

Read the word very carefully: "immortal." Notice that it is made up of two parts: "im" + "mortal." The word "mortal" means able to die or something that leads to death. The prefix "im-" is the "privitive" use of "i-," meaning not. The extra "m" is added because of the "m" at the beginning of "mortal." Therefore, the word "im-mortal" means not able to die. Among the options, "deathless" is the best synonym. Do not confuse "immortal" with "immoral," which means lacking morality or wicked.

"Unhindered" is an adjective that means "not hindered or obstructed," so we need to pick out an adjective that means something like "unobstructed." So, "stymied" cannot be the correct answer, because "stymied" is an adjective that means "prevented or having the progress of (something) hindered," making the word an antonym, not a synonym, of "unhindered." "Unimpeded," however, means "not obstructed or hindered," and because "unimpeded" is the answer choice closest in meaning to "unhindered," "unimpeded" is the correct answer.

If someone is "unwelcome," they are not wanted or not welcome. You can figure this out, because "un-" means not, so "unwelcome" means not welcome. So, "unwanted," which means not wanted, is the correct answer, because it is closest in meaning to "unwelcome."