ambit

n [sing] bounds, scope or extent (of power, authority, etc) （权势等的）范围, 界限, 限度.

amazing, amazingly, amazon, Amazonia, amazonian, ambassador, ambassador-at-large, ambassadorial, ambassadress, amber, amber-like, ambergris, ambi-, ambidextrous, ambience (also ambiance), ambient, ambiguity, ambiguous, ambiguously, ambiguousness, ambition, ambitious, ambitiously, ambivalence, ambivalent, ambivalently, amble, ambrosia, ambrosial, ambulance, ambush, ameba, ameliorate, amelioration, amen, amenable, amend, amendment, amends, amenity,