ציטירנדיקער פּירוש אויף משלי 27:15

the earnings of a harlot. The word earnings [Hebrew: etnan] comes from the word “gift” [Hebrew: mattan], with an extraneous ’alef , and a repeated nun (like the peh in “her adulteries” [Hosea 2: 4] and the resh in “torrential” [Proverbs 27: 15]). It denotes that which the prostitute took (i.e., that which was given her by the men who engaged in prostitution with her).

שוה He hath made plain. Derived from שוה equal; comp. נשתוה alike (Prov. 27:15).