FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

arkeo ἀρκέω — ar-keh'-o — apparently a primary verb (but probably akin to 142 through the idea of raising a barrier); properly, to ward off, i.e. (by implication) to avail (figuratively, be satisfactory):--be content, be enough, suffice, be sufficient.

see GREEK for 142