Jamieson, Fausset and Brown on 1 Peter 3:6

6. Sara--an example of faith.

calling him lord--(Ge 18:12).

ye are--Greek, "ye have become": "children" of Abraham and Sara by faith, whereas ye were Gentile aliens from the covenant.

afraid with any amazement--Greek, "fluttering alarm," "consternation." Act well, and be not thrown into sudden panic, as weak females are apt to be, by any opposition from without. Bengel translates, "Not afraid OF any fluttering terror coming from without" (1Pe 3:13-16). So the Septuagint, Pr 3:25 uses the same Greek word, which Peter probably refers to. Anger assails men; fear, women. You need fear no man in doing what is right: not thrown into fluttering agitation by any sudden outbreak of temper on the part of your unbelieving husbands, while you do well.