59일차. ♣ Unit 4. Business communication - LESSON 4. NEGOTIATING A PURCHASE - [Negotiating vocabulary] [MARGRET] Yeah. You know, I really like your ergonomic chairs, especially the Super Comfort X9 model. • ergonomic /ˌɜːrɡəˈnɑːmɪk/ -designed to make people’s working environment more comfortable and to help them work more efficiently : 인체 공학의 e.g.) ergonomic design 인체 공학적 디자인 an ergonomic keyboard..