The prefix "over-" meansexcessively, so “overconfident” meansexcessively confident, or "arrogant." As for the other answer choices, “meek” meansshy and quiet; “cantankerous” meansgrumpy, angry, and easily annoyed; “quaint” meansold-fashioned and charming; and "rude" meansdisrespectful.

In order to solve this synonym problem you have to consider both the prefix and suffix of the word "omnipresent." The prefixomni-meansevery, alland the suffix-presentmeansplace, where. So the word "omnipresent" meanseverywhere, in all places.To provide further help, "greedy" meanswanting more than you have/need; "fortunate" meansluckyand "unfortunate" meansunlucky. Notice the impact of the prefixun-.

The prefixanti-meansagainst. So an "antidote" is somethingused against poisons, used to provide a solution to poison. This is closest in meaning to "medicine."

To solve this synonym you need to rely on your knowledge of prefixes. The prefixdu-meanstwo of, so a "duplicate" isa second copy of something. It is common to make a "duplicate" of something if it is important and you do not want to lose it, like a "duplicate" key.

To solve this synonym you will again need to rely on your knowledge of prefixes. The prefixdis-meansaway. So to "dispatch" something is tosend it away. To provide further help, "lent" meanslet someone borrow.

The prefixpre-meansbefore, so "prevent" meansto stop something before it happens. To provide further help, "accompany" meansgo with; "continue" meanskeep going; "dispatch" meanssend away; "displace" meansreplace, take over.

The prefixsub-meansunder. Someone who is "submissive" issomeone who likes to be controlled by someone else, someone under control. The closest word to this is "obedient" which meanssomeone who does what they are told. To provide further help, "hostile" meansnot friendly, threatening; "dominant" meansin-charge, it is opposite in meaning to "submissive"; "frenetic" meanschaotic and fast-paced; "unusual" meansweird, not normal.

The prefixmal-meansbadso you can reasonably infer that the correct answer must mean somethingbad. Something that is "malignant" isdeadly, bad for you and dangerous. To provide further help, "benign" meansnot malignant, not deadly, harmless; "unkempt" meansmessy; "scarce" meansrare, in short supply.

The prefixproto-meansfirst. So, a "prototype" isan early or first model of something. Additionally, "elementary" meansbasic, not complicated.

The prefixesdys-anddis-meansnot. As in "dislike" which meansto not like. Furthermore, "functional" meansworking properly. So, "dysfunctional" meansnot working. This is closest in definition to "broken." Additionally, "precious" meanstreasured, very special and important to; "literate" meansable to read and write; "plucky" meanscourageous, brave,usually it describessomeone small who is braver than might be expected; "repaired" meansfixed.