기초 영단어 (Basic English Words) is an educational and reference program developed by Boreumdal Lab. It is a free Android application that aims to help users learn English words effectively. The program offers various word courses tailored to different levels, including pronunciation, basic vocabulary, and TOEIC essential words. Users can study words and example sentences, and then test their knowledge through seven different types of tests.

One of the unique features of 기초 영단어 is the lock screen test, which allows users to study words even when they don't have much time. The incorrect answers are automatically registered and repeated more frequently in future tests. Users can also collect difficult words by pressing the button for further study. The program ensures that the learned words stay in the user's mind through regular testing.

With its diverse word courses and comprehensive tests, 기초 영단어 provides an accessible and convenient way to improve English vocabulary. Whether users are beginners or preparing for the TOEIC exam, this program can be a valuable tool for learning English words.