Where does “employing” come from?

Employing derives from Middle French employer, from Latin implicare meaning to involve or engage, ultimately from the Latin prefix in.

employing (English): present participle of employ

Definitions

Step	Language	Word	Meaning
1	English	employ	The state of being an employee; employment; The...
2	French	emploi	job; employment; use; need
3	French	employer	to employ
4	Middle French	employer	to employ; to use; to make use of
5	Old French	emploier	Alternative form of emploiier
6	Latin	implicō	to entangle, entwine
7	Latin	īn-	un-, non-, not
8	Latin	în	in, at, on, upon, from (space)
9	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
10	Proto-Italic	en	in
11	Proto-Indo-European	h₁én	in