めったにない

i-adjective

rare; uncommon; seldom

Used to describe something that happens very infrequently or is hard to find. Often appears in the pattern 滅多に〜ない (rarely does ~).

• 彼かれは滅めっ多たに怒おこらない。

  He rarely gets angry.

• こんな機き会かいは滅めっ多たにない。

  An opportunity like this is rare.