nidan verb (lower class) with 'ku' ending (archaic), transitive verb
keep away; keep at a distance
Archaic transitive verb; the modern equivalent is 遠ざける (とおざける). Found only in classical or historical texts.
See also: 遠ざける
古語では「人を遠ざく」のように使われた。
In classical language, it was used like 'to keep a person at a distance'.