dot·age 
(dōtĭj)
(dōtĭj)n.
A deterioration of mental faculties associated with aging.
[Middle English, from doten, to dote.]
- disincorporation
- disinfect
- disinfectant
- disinfection
- disinfest
- disinfestation
- disinflation
- disinflationary
- disinform
- disinformant
- disinformation
- disinformer
- disingenuous
- disingenuously
- disingenuousness
- disinherit
- disinheritance
- disinhibit
- disinhibition
- disintegrate
- disintegration
- disintegrative
- disintegrator
- disinter
- disinterest