To give you a bit more context as you wanted as much as possible:
perilous - dangerous, but more than that possibly leading to tragedy or peril (death). The early sttlers coming to the new world faced a perilous journey because many of them perished (died) trying to get to America.
daunting - a task that is daunting may seem impossible. It is extremely difficult, to say the least. It may have seemed like a daunting task to undertake a journey to a new world, but in the end the settlers who came to America were successful.
formidable - formidable is a lot like daunting. It is extremely difficult.
demeaner - this word is actually spelled demeanor and it refers to the way that you carry yourself. If yoiu want to get a job, than you should present yourself at the interview with a professional demeanor.
alfalfa - alfalfa is a type of hay. It is commonly fed to horses, but it is high in both protein and energy. The racehorses were given alfalfa nightly to add calories and energy to their diets.
corrupt - this word means lacking in morals, dishonest, and is generally applied to large groups such as governments or corporations. The government of Mexico, for example, is viewed as corrupt as the police often take kickbacks to to look the other way when the drug dealers do business.
regime - this is a type of ruling body or set of political conditions. Hitler's regime, for example, was one that led to the persecution of all non-Aryans in Germany.