bettered >> /ˈbɛtə/
Definition: [verb] Improve on or surpass (an existing or previous level or achievement)
Example: his account can hardly be bettered
Definition: [noun] The better one; that which is better.
Example: the Natural History Museum book is by far the better of the two
Definition: [noun] One's superiors in social class or ability.
Example: I'm not one to speak ill of my betters
Definition: [adjective] More desirable, satisfactory, or effective.
Example: we're hoping for better weather tomorrow
Definition: [adjective] Partly or fully recovered from illness, injury, or mental stress.
Example: his leg was getting better
Definition: [adverb] More excellently or effectively.
Example: Jonathon could do better if he tried