- 〔無思慮〕(an) indiscretion, imprudence;〔無思慮な行い〕misconduct
不心得な indiscreet, imprudent
- 不心得にもカンニングをした
- He was so misguided as to cheat on [in] an examination.
- 不心得にもほどがある
- You carry your misconduct too far.
- 不心得者an imprudent [indiscreet] person; a misguided [misdirected] person