Shirabe
過ちては 則ち 改むる に 憚る こと 勿れ

改むあらたむ

Nidan verb (lower class) with 'mu' ending (archaic) Transitive
English jmdict
1
transitive verb archaic to change;to alter;to revise;to replace
See also: 改める (あらためる)
過ちを改むるにはばかることなかれ。
It's never too late to make amends.
2
transitive verb archaic to examine;to check;to inspect
See also: 改める (あらためる)
Other forms 革む 【あらたむ】