Mark 4:39 ... ἐπετίμησεν τῷ ἀνέμῳ καὶ εἶπεν τῇ θαλάσσῃ, Σιώπα, πεφίμωσο.
I'm just wondering how to best translate the highlighted word into English. I understand that perfect imperatives are usually constructed periphrastically, but apparently this word is one of the few exceptions. I also understand that in the imperative there is no time component to the construction, rather the aspect is most significant.
Since it is perfect, then, is it best to try to bring across the permanent result of the command? Would a valid loose translation be, "Be silent/calm, and stay that way".
As a side question, can somebody comment on the switch from σιωπαω to φιμοω? Is there a nuance to the meaning of these words, because I understand them to basically mean "to be quiet, to silence".
Thank you for your help.