Medial Geminates & Short Vowel Protection:
In English dissyllables, a medial double consonant (pp, bb, tt, nn) signals that the preceding accented vowel is closed and short:
• happy (/ˈhæpi/), rabbit (/ˈræbɪt/), matter (/ˈmætər/).
• penny (/ˈpɛni/), letter (/ˈlɛtər/), better (/ˈbɛtər/).
Contrast with open syllables where single consonants allow vowel lengthening (e.g., later vs. latter).
Master Morphology: Plural of y Nouns:
Wheeler pairs Lesson 153 with Lesson 159 to solidify the two branches of final -y inflections:
• Consonant + y: penny → pennies, candy → candies, fancy → fancies.
• Vowel + y: chimney → chimneys, monkey → monkeys, valley → valleys.
Point out historical etymology: Anglo-Saxon pennig pluralized as pennigas, producing modern pennies.