Seep \Seep\, or Sipe \Sipe\, v. i. [AS. s[=i]pan to distill.]

To run or soak through fine pores and interstices; to ooze. [Scot. & U. S.]

Water seeps up through the sidewalks. --G. W. Cable.

Source: Webster's Revised Unabridged Dictionary (1913)