Why you keep forgetting Spanish words
You recognise desarrollo when you read it, but you cannot find the Spanish word when you want to say “development”. Or you remember it during a lesson and lose it by the next one.
From those experiences you cannot tell that the word is permanently gone. You learn something from them about when and how you can retrieve it. The next step is to look at the practice behind the earlier correct answer.
Was the answer still in front of you?
Choosing the right word from options, repeating it just after a correction and producing it days later are different accomplishments. You can learn from all of them, but one successful attempt is no proof of lasting recall.
Try a clear prompt without the answer visible. Give yourself time to respond, then check. If you needed help, keep that distinct from an unaided answer. Then you learn more from your practice record than from a score in which every eventual success counts the same.
Did you return to the word later?
With a concentrated session you can get started. If you revisit the word on later occasions, you practise after the immediate familiarity has faded.
In a study of Swahili–English word pairs, people who kept retrieving after an initial correct answer recalled more a week later. That finding is evidence for returning to words you have already answered correctly.
What you remember depends on the material, the way you learned it, later encounters and the task used to check it. In a review app, your answers are evidence for adjusting the schedule.
Is the prompt clear enough?
Sometimes the problem lies in the exercise. For a short English cue, several Spanish words may be right. For a sentence, you may need grammar you have not learned. For two similar words, you may need a clearer contrast.
Suppose you confuse pedir and preguntar. If you repeat “ask” on separate cards, the distinction stays unclear. Compare Pido un café with Pregunto dónde está la estación. In the first, you request something. In the second, you ask a question. Practise the meanings in those situations before testing the words again.
For a wrong answer you need an explanation that fits the error. If you only look at the word, you may not resolve a misunderstanding about its use.
What to do after a mistake
Read or hear the correct answer and make sure you understand it. Then try again after some intervening material. On another day, check whether you can still produce it.
Avoid spending the whole session staring at one blank. When you reveal an answer, you get information to learn from. Difficulty is useful only when you can make progress from the attempt and correction.
In Vozelu, words come up again for practice, and a retry is recorded separately from the first attempt. In later reviews you check what you still remember. How those answers influence the dates is in the explanation of scheduled reviews.
Use the word outside its usual exercise
Find the word in a passage or recording you understand. Try a sentence about something relevant to you. Notice whether the problem is its meaning, spelling, sound or grammatical form.
Practise the part you got wrong, then return to the broader task. One difficult use is not a reason to relearn the whole word.