interpenetration

Noun

 * 1) The act of penetrating between or within other substances; mutual penetration.
 * 2) The situation of two or more bodies overlapping in three-dimensional space, with part of the bodies lying within each other.

Translations

 * Belarusian: узаемапранікне́нне
 * Polish: wzajemne przenikanie
 * Russian:
 * Ukrainian: взаємопрони́кнення