means A male monarch who rules a country, kingdom, or domain, usually by inheritance — or, by extension, the dominant figure in any field.

from From Old English 'cyning,' which traces back to a Proto-Germanic root 'kuningaz' — relatives survive in German 'König' and Old Norse 'konungr.' The deep root is widely linked to a word for 'kin' or 'tribe' (the same family as 'kin' itself), so a king was originally something like 'the man of the people' or 'leader of the family' — the one sprung from noble stock to head the clan. The chair came later; the bloodline came first.