Dear Language-learning Enthusiast,
One of the obstacles that keep language learners in the plateau stage (intermediate level) for a long time is limited vocabulary. For anyone to gain proper mastery or true fluency in any language, they would have to know a lot of words in that language. Words are a key part of languages, basic structures that are too important to overlook in the learning process, thus limitations with regard to vocabulary command could keep learners in an intermediate level for longer than necessary.
If you must move past the intermediate level of learning and continue on your path to true fluency in your language of interest, you would inevitably need to LEARN MORE WORDS. Expand your vocabulary, get actively involved in any learning process that helps broaden your knowledge of words in your target language. Your progress after doing this would be exponential because a better command of vocabulary takes you many steps closer to attaining true fluency in your target language.
Do not be afraid or reluctant to put in the work necessary to master your language of interest, your future self will thank you!