אֶל־כָּל־רֹ֣אשׁ דֶּ֗רֶךְ בָּנִית֙ רָֽמָתֵ֔ךְ וַתְּתַֽעֲבִי֙ אֶת־יָפְיֵ֔ךְ וַתְּפַשְּׂקִ֥י אֶת־רַגְלַ֖יִךְ לְכָל־עוֹבֵ֑ר וַתַּרְבִּ֖י אֶת־תזנתך [תַּזְנוּתָֽיִךְ׃]
你在每個路口建造你的高壇,使你的美貌變為可憎;你向每個過路的人張開雙腿,大大增多你的淫亂。
Rashi
you spread your legs Since He compares her to a harlot, He speaks in terms of sexual activity, in which there is spreading of the legs, a cesmas in Old French, you spread wide apart.