for·get 
(fər-gĕt, fôr-)
(fər-gĕt, fôr-)v. for·got (-gŏt), for·got·ten (-gŏtn) or for·got, for·get·ting, for·gets
v.tr.
1. To be unable to remember (something).
2. To treat with thoughtless inattention; neglect: forget one's family.
3. To leave behind unintentionally.
4. To fail to mention.
5.
a. To banish from one's thoughts: forget a disgrace.
b. Informal To disregard on purpose. Usually used in the imperative: Oh, forget it. I refuse to go!
v.intr.
Idiom: 1. To cease remembering: Let's forgive and forget.
2. To fail or neglect to become aware at the proper or specified moment: forgot about my dental appointment.
forget (oneself)
To lose one's reserve, temper, or self-restraint.
[Middle English forgeten, from Old English forgietan; see ghend- in the Appendix of Indo-European roots.]
for·getter n.