Vocabulary knowledge plays a central role in foreign language proficiency, particularly for learners studying English as a foreign language at the university level. Despite extensive exposure to grammar instruction, many EFL learners continue to experience difficulties in vocabulary retention and active usage. This study explores the effectiveness of digital flashcards as an innovative instructional tool for improving vocabulary acquisition among EFL university learners. The research emphasizes how technology-supported repetition, contextual exposure, and learner autonomy contribute to deeper lexical understanding. The findings suggest that digital flashcards significantly enhance vocabulary retention, learner motivation, and long-term language development when integrated thoughtfully into the academic learning process.