Same entry in other lexica. The headword is intransitive aorist active imperative (singular) of e)fi/sthmi, glossed with aorist passive imperatives. The headword itself must be quoted from somewhere, perhaps the New Testament (2 Timothy 4.2).
[1] The second of these glosses is e)pikei/sqhti elsewhere. Theodoridis on Photius s.v. suggests that the Suda's e)pite/qhti might stem from a conjecture. (He himself ventures e)pi/keiso.)