woman's head covering, veil
幗 centers on a cloth covering worn on the head by women: a head covering or veil.
幗 combines 巾 (cloth) with 國, which likely contributes the sound. The character refers to a cloth head covering for women.
The left side 巾 is a cloth, and the right side 國 suggests something enclosing like a country's borders. Picture a cloth wrapping around the head like a veil enclosing the face.
For カク, imagine a woman wearing a veil that looks like a square *kaku* (角) on her head: kaku -> カク, and the cloth forms a head covering.
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