ergonomic
Ergonomic (adjective) means Designed to fit the human body so that it can be used comfortably and without strain or injury. Example: “An ergonomic chair supports the lower back so you are not hunching by mid-afternoon.”
How to use ergonomic
Learner’s notesIn plain EnglishShaped so it is comfortable for your body to use.
Neutral, and heavily used in product marketing, where it is often applied loosely.
Fill the gap
Can you complete this real example?
An _____ chair supports the lower back so you are not hunching by mid-afternoon.
Etymology
From Greek ergon 'work' and nomos 'law', by way of the noun ergonomics, the study of efficiency in the working environment.