γρηγορειτε verb - present active middle - second person
gregoreuo  gray-gor-yoo'-o: to keep awake, i.e. watch -- be vigilant, wake, (be) watch(-ful).
στηκετε verb - present active middle - second person
steko  stay'-ko: to be stationary, i.e. (figuratively) to persevere -- stand (fast).
εν preposition
en  en: in, at, (up-)on, by, etc.
τη definite article - dative singular feminine
ho  ho: the definite article; the (sometimes to be supplied, at others omitted, in English idiom) -- the, this, that, one, he, she, it, etc.
πιστει noun - dative singular feminine
pistis  pis'-tis: persuasion, i.e. credence; moral conviction; by extension, the system of religious (Gospel) truth itself -- assurance, belief, believe, faith, fidelity.
ανδριζεσθε verb - present middle or passive deponent imperative - second person
andrizomai  an-drid'-zom-ahee:  to act manly -- quit like men.
κραταιουσθε verb - present passive imperative - second person
krataioo  krat-ah-yo'-o: to empower, i.e. (passively) increase in vigor -- be strengthened, be (wax) strong.