Regrettable
Vexing, Annoying
い adjective
くやしい
悔やむ (くやむ) To Regret, To Mourn, To Lament
悔しい (くやしい) Regrettable, Vexing, Annoying
惜しい (おしい) Regrettable, Disappointing, Precious, Dear
遺憾 (いかん) Regrettable, Unsatisfactory
詳しい (くわしい) Detailed, Expert
Cool く...yeah や...shit しい...that was Regrettable.