god knows how

1. 1.

   by some means not understood by the speaker

   “God knows how he did it, but he did climbed that steep wall”

Questions about god knows how

What does god knows how mean?

god knows how means "by some means not understood by the speaker".

Is god knows how a common word?

god knows how is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.