Of uncertain affinity: to abstain from wine (keep sober), i.e. (figuratively) be discreet -- be sober, watch.

νῆφε (nēphe) − 1 Occurrence

νήφοντες (nēphontes) − 1 Occurrence

νήφωμεν (nēphōmen) − 2 Occurrences

νήψατε (nēpsate) − 2 Occurrences