Why the same word "Tshukah" is used in two different situations and contexts as in Bereshit 3:16 and Bereshit 4:7? What does the word mean etymologicaly? How the Mishna and Talmud explain the word and its meaning?

The word "tshuka" means desire, lust or passion.(See Talmud in Kiddushin 30b ) Rashi explains the word basically the same way in both places. The root of the word is שוק. See Yeshayahu 29:8.