IPA: /ˈhiːθiər/
KK: /ˈhiːθiər/
More healthy than something else; having better health or being more beneficial to health.
Eating more fruits and vegetables can lead to a heathier lifestyle.
The word 'healthier' is formed from 'health' (from Old English 'hælu', meaning wholeness or well-being) and the suffix '-ier' (meaning more). Thus, 'healthier' means more healthy or possessing greater well-being.
Think of 'health' as wholeness or well-being, and remember that 'healthier' means having more of that well-being.