Prefixes: A-d Period 5

Explanation
The given list consists of words starting with the prefix "ab-". All the words in the list share this common prefix, which indicates a similarity or connection between them. The words "absent," "abnormal," "abduct," and "abstain" all have different meanings but they all start with "ab-". This suggests that the prefix "ab-" is a key element in forming these words and gives them a common thread.

Explanation
The given words "antebellum, antedate, antecedent, antediluvian" all have the prefix "ante-" which means "before" or "prior to". "Antebellum" refers to the period before a war, typically used to describe the pre-Civil War era in the United States. "Antedate" means to precede in time or to be earlier than something. "Antecedent" refers to something that comes before or precedes another. "Antediluvian" means extremely old or antiquated, often referring to a time before the biblical flood. Therefore, all of these words relate to something happening or existing before a specific time or event.

Explanation
The given words all start with the prefix "anti-", which means against or opposite. This prefix is commonly used to indicate opposition or negation. In the context of the words provided, "antisocial" refers to being against or opposed to social behavior, "antichrist" refers to being against or opposed to Christ, "antidepressant" refers to a medication that counteracts or opposes depression, "antifreeze" refers to a substance that prevents freezing, and "antibiotic" refers to a substance that opposes or fights against bacteria.

Explanation
The given answer consists of a list of words that all start with "auto". This prefix means "self" or "automatic" in Greek. Therefore, all the words in the list are related to the concept of self or automatic.

Explanation
The answer includes a list of words that all begin with the prefix "circum-". This prefix means "around" or "surrounding". Each word in the list has a different meaning, but they all share the commonality of having the prefix "circum-".

Explanation
The given answer includes three words: cooperate, coauthor, and cosign. These words all start with the prefix "co-" which means "together" or "with." In each of these words, the prefix "co-" is followed by a verb, indicating an action done in collaboration or partnership with someone else. "Cooperate" means to work together towards a common goal, "coauthor" means to write a book or article together with someone, and "cosign" means to sign a document or agreement jointly with another person. Therefore, the correct answer consists of three words that all involve working together or collaborating with others.

Explanation
All the words listed in the question have the prefix "con-". This prefix means "together" or "with". Therefore, all the words in the answer choices also have the prefix "con-". The given answer choices, "convene, compress, contemporary, converge, compact, combine," all fit this pattern and have the prefix "con-".

Explanation
The given words "contradict," "counteract," "contravene," and "contrary" all have similar meanings related to opposition or contradiction. They all convey the idea of going against or conflicting with something. "Contradict" means to deny or oppose a statement or belief. "Counteract" means to neutralize or oppose the effects of something. "Contravene" means to violate or go against a rule or law. "Contrary" means to be opposite or contradictory to something.

Explanation
The given answer consists of a list of words that all start with the prefix "de-". This prefix is commonly used to indicate negation or reversal. Each of the words in the answer has a different meaning, but they all share the common feature of being actions or processes that involve undoing or reversing something. Therefore, all of the words in the answer can be categorized as verbs that involve removing or reversing a particular state or condition.

Explanation
The answer includes words that start with the prefix "dia-". This prefix is commonly used in words of Greek origin and means "through" or "across". All of the words provided in the answer - diameter, diagonal, dialogue, dialect, diagnosis, diagram - start with "dia-" and fit this pattern.

Explanation
The common theme among all the words is the prefix "dis-" which means "not" or "opposite of". In each word, the prefix is used to negate or reverse the meaning of the root word. For example, "dismiss" means to send someone away or reject, while "differ" means to be unlike or not the same. Similarly, "disallow" means to forbid or refuse permission, "disperse" means to scatter or spread out, "dissuade" means to convince someone not to do something, "disconnect" means to separate or break the connection, "disrespect" means to show lack of respect, "disbelief" means to not believe or have doubt, "discomfort" means to cause physical or mental unease, "discredit" means to harm someone's reputation or credibility, and "different" means not the same or distinct.