Diddarbod, a. improvident
Diddarfod, a. endless
Diddawn, a. ungifted, graceless
Diddawr, a. unconcerned
Diddeall, a. irrational
Diddefnydd, a. unsubstantial; useless
Didderbyn, a. unreceiving
Diddestl, a. untidy
Diddewis, a. without choice
Diddial, a. without revenge