This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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ad. Such as to be greater than usual; particularly; exceptionally.

ad. Such as to be strange or odd.

ad. Strongly associated with.

ad. In a peculiar manner; particularly; in a rare and striking degree; unusually.

In a peculiar manner; in a manner not common to others; hence, in a remarkable or impressive degree; especially; particularly; strangely: as, he had made this subject peculiarly his own; she was very peculiarly attired.

ad. uniquely or characteristically

ad. to a distinctly greater extent or degree than is common

ad. in a manner differing from the usual or expected

"Fortunately for an answer to this question, air is as vital to change in the inorganic processes of nature as it is to those other changes which we call peculiarly life."

particularly    unusually