My son also pops out random word questions like that, but not quite like that. That's pretty extraordinary. Where on earth she's heard words like 'erroneous' and 'shuck' in the same day I'm sure you're left wondering.
My kid will ask a word definition and then use it in conversation as soon as he finds the opportunity. Don't know if there's any way to parlay the interest into a challenge for your girl to lower the repeat rate slightly. I know how exhausting the relentless interrogation (in the cutest possible way) can be.
One of my DS's line of questioning I find quite tricky, as they seem to be designed as trick questions, is along the lines of "What does "have" sound like without the "E"?"
"Um...have."
Sometimes his questions seem unrelated to anything, (How long does it take to get better from diarrhea? Is infinity a prime number? Why did you put your finger in your nose?).
Me: "These are great questions for the morning, it's time to sleep now."
