Regrettable
Disappointing, Precious, Dear
い adjective
おしい
惜しむ (おしむ) To Be Frugal, To Be Sparing
惜しまない (おしまない) Without Sparing, Spare No
惜しい (おしい) Regrettable, Disappointing, Precious, Dear
悔しい (くやしい) Regrettable, Vexing, Annoying
遺憾 (いかん) Regrettable, Unsatisfactory
Oh お shit しい that was Regrettable.