Therein

Etymology
Modern English there, + Modern English in.

Adverb

 * 1)  in that; in him/her/it
 * 2) * My observation is that whenever one person is found adequate to the discharge of a duty... it is worse executed by two persons, and scarcely done at all if three or more are employed therein. &mdash; George Washington

Anagrams

 * neither

therein therein therein therein therein therein therein therein therein therein therein therein