regrettable
regret + -able
https://gyazo.com/65b252ef43f3cd0e9480909a7f24aa71
source: Twisted accident (Yozakura Quartet) - Album on Imgur
adjective
(of conduct or an event) giving rise to regret; undesirable; unwelcome:
⦅かたく⦆ 〈行為・事件などが〉遺憾な, 残念な, 惜しむ[悲しむ]べき
e.g. the loss of this number of jobs is regrettable
e.g. irresponsible and regrettable actions.