mercenary

The word 'mercenary' originates from the Latin mercenarius, meaning 'hired for pay', which itself derives from merces (wages, reward). This Latin root is connected to the broader concept of merchandise and trade, stemming from the Proto-Indo-European root merĝ- meaning 'to seize'. The core logic of the word has remained remarkably consistent: from the literal sense of a person whose services are for sale, specifically a hired soldier, it evolved to describe any action or motivation driven purely by financial reward. This semantic journey from a concrete occupation to an abstract character trait illustrates the direct link between economic transaction and perceived lack of higher principle.

Structure: mercen (hire) + ary (adjective/noun suffix) mercen (from Latin mercenarius, meaning 'hired for pay', from merces 'wages, reward'); ary (a suffix of Latin origin forming adjectives meaning 'pertaining to' or nouns meaning 'one connected with').