mercenary
1. mer.ce.nary \'m*rs-*n-.er-e-\ n [ME, fr. L mercenarius, fr. merced-,
merces wages - more at] MERCY : one that serves merely for wages; esp : a
soldier hired into for eign service
2. mercenary aj 1: serving merely for pay or sordid advantage : VENAL; also
: GREEDY 2: hired for service in the army of a foreign country
Webster's English Dictionary