• [λυπέω] λυπῶ , to grieve, pain somebody
  λυποῦμαι (middle) to be sad, be sorrowful
  Earlier on I introduced: λυποῦμαι πολύ (I'm very sorry!)
• ὁ θάνατος death
  οἱ ἀθάνατοι the immortals (=gods), the Immortals (the elite, the very best, the flower of Xerxes' army who practically all lost their lives for him at Salamis)
• ὁ θυμός spirit (courage, energy, that sort of spirit)
  [ἀθυμέω] ἀθυμῶ, I loose courage, despair
  μὴ ἀθύμει (don't despair!) said granddad to Philip in lesson 5 when he'd lost his dog in the hills
• ἡ ῥώμη strength (think of ἡ Ῥώμη (Rome, capital of the Roman Empire) and its strength. It dominated practically all of the known world. And that requires strength.
• πλανάομαι to wander (about). Did not give us the word: an esplanade, despite the fact that people wander about on an esplanade. Esplanade comes from Latin explanare (to make level)
  But the word planet (referring to those celestial bodies we know are wandering in their orbits around the sun) does come from ὁ πλανητής πλανώμενος the wandering wanderer
• τὸ οἰνοπωλίον wine-shop, inn
  from ὁ οἶνος wine and
  from [πωλέω] πωλῶ to sell,
  which we had in lesson 9a, when the whole family was hungry and a sausage-seller came pushing his wares through the crowd at just the right moment.:
  ἐν καιρῶ ἀλλαντοπώλης τις προσεχώρησε
  ἐν καιρῶ τὰ ὦνια διὰ τοῦ ὁμίλου ὠθιζόμενος
• and others

 New:    We learn to count from here to infinity.

 The supplementary text:  ὁ Ξέρξης πρὸς τὴν Ἀσίαν ἀναχωρεῖ tells of Xerxes' retreat to Asia and what happened on the way.