How to build vocabulary that sticks
Everyone forgets words, and that is simply how memory works. The trick is to see a word again just as it starts to slip, which is exactly what spaced repetition takes care of. Which words you pick, and in what order, matters just as much as the method itself.
Frequency first
The rarer words can wait until you actually run into one in the wild.
More than a translation
A word is more than its dictionary gloss. It has a part of speech, the words it usually travels with, and shades of meaning. Learn it inside a short example, so you remember how it is used and not just what it means.
Spacing beats cramming
Climb by level
Group vocabulary by CEFR level so the difficulty rises with you. Finish the A1 core before you reach for B-level abstractions, since each level builds the base the next one assumes.
Verboteca ships a curated A1 to C2 course for each language, every word with examples and graded by your own recall. A1 is free; Premium opens A2 through C2 on the same engine that runs the conjugation drills.