"she'eirah": This is her food, as in (Michah 3:3) "and who eat the she'er of My people", and (Psalms 78:27) "He rained she'er (manna) upon them as dust." (Exodus, Ibid.) "kesuthah": as stated (i.e., "her clothing"), "and onathah": her (conjugal) time, as in (Genesis 34:2) "And he lay with her and ye'anehah." These are the words of R. Yoshiyah.
Rabbi Yoshiyah Identifies the Three Terms as Food, Clothing
Mekhilta Tractate Nezikin 3:23