built, reinforced

Webster's Dictionary (GCIDE)

1.advanced to a more desirable or valuable or excellent state. Opposite of unimproved. [Narrower terms: built, reinforced; cleared, tilled ; {developed; grade ; {graded, graveled ] Also See: {restored. [WordNet 1.5]

2.changed for the better; as, her improved behavior.

Syn: amended. [WordNet 1.5]