intransitive verb. To become mixed or united by penetration.

intransitive verb. To penetrate reciprocally.

intransitive verb. To penetrate thoroughly; permeate or pervade.

To penetrate or pass into reciprocally; unite with by mutual penetration.

To penetrate between or among (the component parts of a body or substance); pass into or within the different parts of (a body); penetrate in various directions or throughout.

To penetrate mutually; become united by mutual penetration.

intransitive verb. To penetrate each the other; to penetrate between bodies or their parts.

intransitive verb. in late Gothic architecture, a decoration by means of moldings which seem to pass through solid uprights, transoms, or other members; often, two sets of architectural members penetrating one another, in appearance, as if both had been plastic when they were put together.

transitive verb. To penetrate between or within; to penetrate mutually.

verb. To penetrate mutually or reciprocally

verb. To permeate or pervade

verb. penetrate mutually or be interlocked

verb. spread or diffuse through

"Commercial and noncommercial spaces interpenetrate."

interpenetrated  interpenetrates  interpenetrating