English

ex-con

From ex- + con.

A compound of ex- + con

Proto-Indo-European *eǵ-

Latin ex ‘out of, from’

English ex-

Proto-Indo-European *ḱóm ‘with, along, at’

…

Proto-Italic *kom- ‘together’

Proto-Italic *komteros ‘the other of the two who meet, opposite’

Proto-Italic *komterād

Latin contrā ‘against’

English con

Today it means

noun A former prisoner.

Language periods are conventional ranges, not dates for this word.