Vocabulary knowledge is generally considered one of the main elements of second-language proficiency. Lack of adequate lexical resources prevents the learner from understanding input, conveying meaning, and engaging in communicative activities. According to recent meta-analytic and empirical studies, vocabulary knowledge remains a key predictor of language proficiency, reading comprehension, and communicative competence in EFL contexts (Zhu et al., 2024).
Khoramak et al. (Fri,) studied this question.