interfile

[ in-ter-fahyl ]
/ ˌɪn tərˈfaɪl /

verb (used with object), in·ter·filed, in·ter·fil·ing.

to combine two or more similarly arranged sets of items, as cards or documents, into a single file.

Origin of interfile

First recorded in 1945–50; inter- + file1

British Dictionary definitions for interfile

interfile
/ (ˌɪntəˈfaɪl) /

verb (tr)

to place (one or more items) among other items in a file or arrangement
to combine (two or more sets of items) in one file or arrangement