1 Corinthians 11:6 - Ellicott's Commentary On The Whole Bible

Let her also be shorn. — The force of this argument depends on the fact that a woman’s head being uncovered would be regarded by others as implying the same shame as was indicated by a woman’s hair being cut short (i.e., shorn), or altogether removed (i.e., shaven). It is as if the Apostle said — If a woman insists on her right to pray and speak in an assembly with uncovered head, let her carry out this principle to its logical result; let her insist on her right to have her hair cut short, so as to show her equality with man — and what would be thought of her then! No woman with a spark of shame in her would think of doing that. Accordingly you admit that this principle of sexual equality does not apply in all such matters; and it is illogical to argue in favour of any general principle as if it were of universal obligation, when you yourselves admit that it is not applicable in some cases.