[4J7z0Fgt63dTZbs]

You've got it wrong, you don't read to learn vocab, you learn vocab to supplement reading experience.

A bookmarklet that acts as mouse over dictionary, added with a system that saves the whole context (and its distinguishing look) of whatever user is reading on browser, combined with a repetitive learning aid (like one you have as flashcard) is the right approach to assistive vocab learning.

[rpedroso]

Not if you're a writer. Not that I want to read novels or papers that sound like a thesaurus threw up on a keyboard, but it's good to always have the right word to express a thought.