The implication in the contrast formed in this sentence is that Donald does not have superior or extremely noteworthy skills at the organ (though he is adequate). A “virtuoso” is one who has great skills, particularly in artistic or musical areas, so this is better than “expert” for our purposes. The term is related to “virtue,” which is derived from the Latin “virtus,” meaning “strength” or “power.” This word came to be applied to virtue in the sense that we use the term insofar as virtue “empowers” one to act in a truly good manner.

By looking at the contrast established in this sentence, we can say that Francis must have been something of a womanizer or rather promiscuous during his college days. Such a person is called a “philanderer,” a term almost always applied to men.

This is in because of its literal meaning, “man of (many) love(s)” from “phil+anderer.” The “phil-” portion is found in words like “philosophy,” which means “love of wisdom,” and “Philadelphia,” “(the city of) brotherly love.” The second half comes from the Greek word for man and is found in English words like “android,” and “polyandry” (meaning “having many husbands”).

Since she is different than her brother (in this respect, at least), Gina must be happy and able in social company. Such a person is “gregarious”, a word that is derived from the Latin root “grex” (and “gregis”) for “flock.” This base has many related English words that likewise reflect this “multitude” or “flock,” such as “aggregation,” “congregation,” and “segregate.”

One is considered to be “droll” if their actions are amusing because of their curious manner. The humor is not necessarily “side-splitting” in the sense of being boisterously humorous. In an older usage, the word “droll” means a jester (of sorts), and the word might be derived from roots meaning an imp or goblin. Even if this is not the case, we can add (for our vocabulary expansion) that the word “impish” means mischievous or (sometimes) odd or crafty.

The key word is “commendation”, meaning praise; therefore, what Leo did not like (but did here accept) is “praise.” To be praised is to be “lauded,” a word derived from a Latin roots for to praise, which can be found in “laudatory” and “laudable.”

The roots of “cosmopolitan” come from two Greek bases that you should know (at least indirectly). “Cosmo-” comes from the Greek “kosmos,” which means either order or (more appropriate for our usage) universe.

Related English words are “cosmic” and “cosmology.” The second half of the word comes from Greek roots meaning “city” and are found in English words like “political,” “polity,” and “politician.” One who is cosmopolitan is therefore one who lives as though the world were his or her city. Such a person is comfortable in many cultures and milieus.

Spring colors are bright green, hence they are “verdant.” The word comes to us from the Latin word for green, but if you have had other modern languages, you should notice a similarity in the words used for green: “vert” in French, “verde” in Spanish, and “verde” in Italian.

In contrast to his poor youth, Lucian’s lifestyle must have become rather wealthy. If something is “opulent” it is outwardly or obviously rich or luxurious. It comes from the Latin root “ops-,” which means either power / might or wealth / resources. It is related to the word “copious,” which means in abundance or great supply.

Since there is a plentitude of fish, we could say that there was a “surfeit,” which is an excessive amount of something. The prefix of the word is really an abbreviation of “super-”, which means “above.” The “-feit” portion is derived from the Latin “facere,” which means to do or make and is reflected in many English words like “fact,” “factory,” “artifact,” and so forth.

The key is that Jonathan is not like his brother; therefore, he is not talkative. While this might be described as “understated,” the most direct choice would be “taciturn.” This word means to be silent or reserved in speech. It is derived from the Latin tacere (and related words), which means to be silent or leave unmentioned. A related English word is “tacit.”