repentant
adjective
[ rɪˈpɛntənt ]
• expressing or feeling sincere regret and remorse; remorseful.
• "he is truly repentant for his incredible naivety and stupidity"
Similar:
penitent,
contrite,
regretful,
full of regret,
sorrowful,
rueful,
remorseful,
apologetic,
conscience-stricken,
ashamed,
guilt-ridden,
chastened,
self-reproachful,
shamefaced,
guilty,
compunctious,