Unkept - not retained, not preserved, not maintained Unkempt - neglected, untidy because of neglect, disheveled (like the unkempt clothes of a tramp) Essentially, the word, unkept, is not commonly used in English.
Unkempt is a fossilized form of the word "uncombed." It has nothing to do with kept, which is the past of keep.
has is the third person singular present - he/she/it has. have is used with the first and second persons singluar and all persons in the plural - I/we/you/they have.
You must be on drugs. No offense but that doesn't even make a pinch of sense!!
being messy or untidy
How to Get Your Hair Grungy