[quote=@TJByrum]PS:  How is [i]indiscriminately [/i]a word but [i]discriminately [/i]not?
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I think it becomes discriminatingly. You can be discriminating or undiscriminating, but not indiscriminating. So I guess the trouble arises that both in and un discriminate are valid, but only un seems to become an adjective. Yet all of them have adverbs, so in skips the ing step to get there.

I was with you when I started looking into this, but indiscriminately is the one that feels like an aberration now.

Edit: So discriminate comes from Latin, and as I understand it that means in should be the prefix. I guess indiscriminating might just sound wrong? Help.