"bettered" in the verb sense
1. better, break
surpass in excellence
"She bettered her own record"
"break a record"
2. better, improve, amend, ameliorate, meliorate
to make better
"The editor improved the manuscript with his changes"
3. better, improve, ameliorate, meliorate
get better
"The weather improved toward evening"
Source: WordNet® (An amazing lexical database of English)
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