[Terretta]

I found the word very clear. Here, rewritten to use both of the most common definitions of the word:

"It's OK for Google to weaken or impair Microsoft's for-pay licensing business by giving away Android for free, by eroding the foundational concept of an OS being something you pay for; but it's not OK for Microsoft to weaken or impair Google's attempts to give away for free, by eroding the foundational concept of its free-ness[1], an OS that violates patents belonging to Microsoft?"

[1] undermining free as in speech by showing it is encumbered, and undermining free as in beer by licensing the relevant patents for relevant dollars