Oh, derived from the word "angel."
Appropriate.
The Big Bang Theory Season 4, Episode 22
...we need the APPROPRIATE words
to mark this historic scientific event.
The Big Bang Theory Season 2, Episode 12
What kind of tea
is APPROPRIATE
The Big Bang Theory Season 12, Episode 23
Why would you think
this is an APPROPRIATE gift?
The Big Bang Theory Season 6, Episode 20
Try to wear something APPROPRIATE.
It won't help my case if the judge...
The Big Bang Theory Season 3, Episode 16