滅多(めった)thoughtless, reckless, careless, rash, seldom (with neg. verb), rare, ordinary, usual, common, excessive, immoderate, extreme

引(ひ)きこもりは滅多(めった)に外出(がいしゅつ)しません。

Recluses seldom go out. {thoughtless, reckless, careless, rash, seldom (with neg. verb), rare, ordinary, usual, common, excessive, immoderate, extreme}

滅多(めった)な事(こと)を言(い)って部長(ぶちょう)を怒(おこ)らせてしまった。

I ended up angering the department head by saying something thoughtless. {thoughtless, reckless, careless, rash, seldom (with neg. verb), rare, ordinary, usual, common, excessive, immoderate, extreme}

彼(かれ)は肝(きも)が据(す)わっているから滅多(めった)なことでは驚(おどろ)かない。

He seldom gets surprised because he's got nerves of steel. {thoughtless, reckless, careless, rash, seldom (with neg. verb), rare, ordinary, usual, common, excessive, immoderate, extreme}

母(はは)が息子(むすこ)に：「滅多(めった)な事(こと)を言(い)うものではない。呆(あき)れられちゃうよ。」

Mother said to her son, "You shouldn't say thoughtless things. It's appalling." {thoughtless, reckless, careless, rash, seldom (with neg. verb), rare, ordinary, usual, common, excessive, immoderate, extreme}

こんな機会(きかい)は滅多(めった)にないこととてこの機会(きかい)を無駄(むだ)にするなんて出来(でき)ません。

This opportunity is rare, so I can't afford to waste it in such a thoughtless manner. {thoughtless, reckless, careless, rash, seldom (with neg. verb), rare, ordinary, usual, common, excessive, immoderate, extreme}