Termy - Vocabulary Explanations

Highlight any English phrase on any website and get instant, level-adjusted explanations

Select any English word or phrase on any website and get instant vocabulary explanations tailored to your level. On YouTube, Termy works with subtitles — just enable captions and trigger Termy to explain what you're hearing. Termy breaks down unfamiliar vocabulary with clear definitions adjusted to your CEFR proficiency level (A1–C2). Whether you're reading news, watching YouTube, browsing Reddit, or studying articles — highlight text, press a shortcut, and understand it instantly. HOW IT WORKS 1. Select text on any webpage (or enable subtitles on YouTube) 2. Press Alt+Shift+X (or Cmd+Shift+X on Mac), or right-click and choose "Explain with Termy" 3. Get instant, level-appropriate explanations in a clean overlay FEATURES • CEFR-adjusted explanations — from Beginner (A1) to Proficient (C2) • YouTube subtitle support — explain vocabulary from video captions • Translation mode — translate phrases to your native language • Keyboard shortcut — quick access without leaving the page • Right-click context menu — explain any selected text • Real-time streaming — see explanations as they appear • Smart caching — instant results for previously explained terms • Desktop app sync — connects with Termy Desktop for a unified experience • Works on any website PERFECT FOR • English learners reading web content or watching YouTube • Students studying articles and textbooks online • Non-native speakers browsing news, forums, and social media • Anyone expanding their English vocabulary Free with limits. Subscribe for unlimited access.