cohort
n.
5ME < L cohors, enclosure, enclosed company, hence, retinue, crowd < co3, CO3 + IE *DhTtis, a gathering < base *Dher3, to grasp, enclose > YARD26
1 an ancient Roman military unit of 300-600 men, constituting one tenth of a legion
2 a band of soldiers
3 any group or band
4 an associate, colleague, or supporter !one of the mayor‘s cohorts"
5 a conspirator or accomplice
6 a subgroup sharing a common factor in a statistical survey, as age or income level