INTACT a.
Untouched, especially by anything that harms, defiles, or the like; uninjured; undefiled; left complete or entire. Buckle. When all external differences have passed away, one element remains intact, unchanged, -- the everlasting basis of our common nature, the human soul. F. W. Robertson.
INTERCALATION n. 2 definitions
The insertion or introduction of anything among others, as the insertion of a phrase, line, or verse in a metrical composition; specif. (Geol.), the intrusion of a bed or layer between other layers. Intercalations of fresh-water species in some localities. Mantell.