SEEPIN
6 letters
Historical clue formulations
- Permeate — 2017-09-04
- Gradually become noticeable — 2017-02-04
- Percolate — 2012-12-14
- Enter via osmosis — 2011-12-20
- Come through slowly — 2010-06-24
- Enter drop by drop — 2005-01-28
- Enter via cracks — 2004-09-24
- Enter through the cracks — 1998-05-22
- Enter gradually — 1994-12-30