If you describe something or someone as unkempt, you mean that they are untidy, and not looked after carefully or kept neat. His hair was unkempt and filthy. the unkempt grass. an unkempt old man. unkempt hair or plants have not been cut and kept neat (kempt (11-21 centuries), from cemban )
not properly maintained; "an unkempt garden"; "native vistas and unkempt rambling paths"