etymology--Isabella

et·y·mol·o·gy  (t-ml-j)

n. pl. et·y·mol·o·gies

1. The origin and historical development of a linguistic form as shown by determining its basic elements, earliest known use, and changes in form and meaning, tracing its transmission from one language to another, identifying its cognates in other languages, and reconstructing its ancestral form where possible.

2. The branch of linguistics that deals with etymologies.

Context

Learning to speak Spanish enhanced Isabella's vocabulary because so many English words have the Spanish cognate as part of their etymology: "Quixotic," from Don Quixote, became one of her favorite words.

sockdologer--Jack

sock·dol·a·ger also sock·dol·o·ger (sk-dl-jr)

n. Slang

1. A conclusive blow or remark.

2. Something outstanding


Jack's sockdologer on the tennis court was as crisp as his sockdologer in the debate.

avuncular--Brother Matt's birthday word

a·vun·cu·lar/əˈvəNGkyələr/

Adjective:

Of or relating to an uncle. Kind and friendly toward a younger or less experienced person: "an avuncular manner".

Uncle Matt gazed at little Isabella with avuncular affection.

penultimate--Sam and Lucie

pe·nul·ti·mate  (p-nlt-mt)

adj.

1. Next to last.

2. Linguistics Of or relating to the penult of a word: penultimate stress.

n.

The next to the last.


Context:
Sam is the penultimate Turchetta child, just as Lucie is the penultimate Edwards child.

Agathokakological--Willie's birthday word

Agathokakological  means  Made up of Both Good and Evil

When the other kids complain that Auntie Mary is evil, Willie stands up for her: "She's not evil," he says. "She's agathokakological!" That stops 'em.

Thanks to http://www.factacular.com/subjects/Interesting_Words for the excellent word.

Antediluvian--Willie

an·te·di·lu·vi·an (nt-d-lv-n)

adj.

1. Extremely old and antiquated. See Synonyms at old.

2. Bible Occurring or belonging to the era before the Flood

 

Willie got in trouble when he called his grandpa "Mr. Antediluvian."  (He didn't really say that.I'm just teaching vocabulary..)

maven--Hayden

ma·ven also ma·vin  (mvn)

n.

A person who has special knowledge or experience; an expert.


When the Turchettas can't work their X-Box, they call their techology maven, Hayden.