"Pleasant" means enjoyable; terrible means very bad; sad means not happy; frequent means occuring many times; and brave means courageous.

“Superb” means excellent, perfect, or very good, so "excellent" is the correct answer. To provide further help, “inadequate” means not good enough; “mediocre” means average when higher quality was expected; “monotonous” means tedious and boring or spoken using one tone; and “confined” means restrained.

Something that is "lucrative" makes a lot of money, this is the same as saying "profitable." A business that is "profitable" and "lucrative" is a business that makes a lot of money. To provide further help, "desolate" means isolated and without life; "remarkable" means fascinating, interesting; "corny" means cheesy. 

"Productive" means efficient. If someone has been "productive" than they have got a large amount of work done. To provide further help, "untimely" means happening at a bad time, happening too soon; "forceful" means done or said with force; "considerate" means kind and thoughtful; "remorseful" means sorry, feeling sorry for having done something wrong.

"Fundamental," when used an adjective, most nearly means something that is of basic and of essential importance. 

"Odd" and "abnormal" are synonyms. They refer to something or someone that is out of the ordinary. The other words do not share this meaning. "Common" and "usual" are antonyms of "odd."

"Good" and "great" are closely related, as are "plenty" and "a lot." The word "rare" is closest in meaning to the word "few." "His paintings were considered rare because so few were left after the fire." Process of elimination can help you arrive at the correct answer here.

The words "worthy" and "valuable" are synonymous; they refer to something that has value. The word "worthless" is an antonym of the words "worthy" and "valuable." "Needless" refers to something that is not necessary. "Needy" refers to someone who demands a lot of attention.

"Hardy" means something is able to withstand difficult conditions. Animals such as the polar bear are hardy because they live in very cold climates. "Tough" means something can withstand difficult conditions or rough handling. A person that is treated poorly but continues to excel might be said to be tough.

"Forceful" means strong or assertive.

PRINCIPAL can be used as both a noun and an adjective. When used as a noun, it means most important person in an organization. In this case, you are looking for its meaning as an adjective. As an adjective, PRINCIPAL means first, or primary.

A "janitor" is someone that cleans the inside of buildings.

"Final" means last.

A "friend" is someone you like and spend time with.

"Intermediate" means middle.