How many words do you actually know?
Vocabulary size depends on what “know” means. You recognize far more words while reading than you can retrieve in conversation, so passive and active vocabulary should be counted separately.
Ask someone how many words they know and you'll get a shrug. Ask a linguist and you'll get a better question back: know how? There are two vocabularies in your head, and they are not the same size.
What counts as knowing a word?
Your passive vocabulary is every word you recognize on the page. For an adult native English speaker, studies put this in the tens of thousands of word families. Your active vocabulary (the words you actually reach for in speech and writing) is a fraction of that, and the fraction is smaller than most people would guess. The gap is why reading feels easy and the right word in conversation sometimes won't come.
What changes your vocabulary size?
Childhood does most of the early work for free; adulthood is where growth stalls. This isn't because adult brains can't learn words, but because adult life stops presenting new ones. The words you meet at thirty are mostly the words you met at twenty. Growth after that is a choice: readers who seek out harder material keep adding words for decades, and the compounding is real. One genuinely learned word a day is around three hundred a year, enough to noticeably change how you read, then how you write, then how you sound.
How do words move from recognition to recall?
The trick isn't recognizing more words. It's promoting them from passive to active. That takes retrieval: being asked for the word and producing it, a few times, spaced out. It's the entire reason Verba pairs its daily words with a practice loop instead of a glossary. Recognition starts the acquaintance, recall makes it a working friendship.
