I even I am he that blotteth out
machah  (maw-khaw')
to stroke or rub; by implication, to erase; also to smooth (as if with oil), i.e. grease or make fat; also to touch, i.e. reach to
thy transgressions
pesha`  (peh'-shah)
a revolt (national, moral or religious) -- rebellion, sin, transgression, trespass.
for mine own sake and will not remember
zakar  (zaw-kar')
to mark (so as to be recognized), i.e. to remember; by implication, to mention
thy sins
chatta'ah  (khat-taw-aw')
an offence (sometimes habitual sinfulness), and its penalty, occasion, sacrifice, or expiation; also (concretely) an offender