Poor Clara, who appeared to Higgins and his mother as a disagreeable and ridiculous person, and to her own mother as in some inexplicable way a social failure, had never seen herself in either light; for, though to some extent ridiculed and mimicked in West Kensington like everybody else there, she was accepted as a rational and normal—or shall we say inevitable?
There are no more uses of "inexplicable" in the play.
Show samples from other sources
With that he turned away and once again started inexplicably walking toward the wall.
James Dashner -- The Scorch Trials
For some inexplicable reason, those words popped into Thomas’s mind.