Dis-own, _gwadu_, _diarddelwi_; _dihawlu_
Dis-pel, _gwasgaru_, _taenu_; _gyru ar ffo_
Dis-pense, _cyfranu_, _dosbarthu_; _hebgor_
Dis-perse, _gwasgaru_, _chwalu_; _dosbarthu_
Dis-play, _arddangosiad_: _arddangos_; _darlunio_
Dis-please, _anfoddio_; _tramgwyddo_; _casäu_
Dis-pose, _trefnu_, _dosbarthu_; _tueddu_; _gwerthu_
Dis-pute, _dadl_: _dadleu_; _gwrthwynebu_
Dis-sent, _anghytundeb_, _neillduaeth_: _anghytuno_; _ymneillduo_
Dis-solve, _toddi_, _dadmer_, _dadgorffori_
Dis-tance, _pellder_, _meithdra_: _pelläu_
Dis-tinct, _gwahanol_, _neillduedig_; _eglur_
Dis-tract, _croesdynu_; _poeni_; _gwallgofi_
Dis-train, _gafaelu_, _attafaelu_; _codi da_
Dis-tress, _cyfyngder_, _ing_: _cyfyngu_, _cystuddio_
Dis-trict, _cylchdaith_; _tiriogaeth_, _ardal_
Di-verse, _amrywiol_; _gwahanol_; _amgen_
Di-vide, _rhanu_, _cyfranu_; _ysgar_, _ymagor_
Di-vine, _duwinydd_; _dwyfol_: _dewinio_; _dyfalu_
Di-vorce, _ysgariaeth_: _ysgaru_; _dadbriodi_
Di-vulge, _cyhoeddi_; _dadguddio_, _amlygu_
Doc-tor, _doethor_, _dysgawdwr_: _meddyg_: _meddygu_; _doctora_
Dor-mant, _swmer_; _cysgadwr_; _cysgedig_
Dou-ble, _plyg_; _dyblyg_; _yn ddeublyg_: _plygu_
Dra-per, _golofydd_; _brethynwr_; _llieiniwr_
Draw-er, _tynwr_; _lluniedydd_; _llogell_
Draw-ing, _tyniad_, _llusgiad_; _darluniad_
Dread-ful, _ofnadwy_, _erchyll_, _arswydlawn_
Duc-tile, _hydyn_, _ystwyth_; _estynadwy_
Du-el, _ornest_; _ymryson_: _ymladd ornest_
Dull-ness, _hurtrwydd_; _pylni_; _tywyllni_
Du-ly, _yn ddyladwy_; _yn addas_; _yn brydlawn_
Dun-geon, _daiardy_; _dyfngell_: _carchargellu_
Dung-hill, _tomen_, _teilfa_; _tomenaidd_
Du-ring, _yn parhau_; _parhäus_; _hyd tra_
Du-ty, _dyledswydd_; _swydd_; _toll_, _treth_
Dwell-ing, _preswylfod_; _ty annedd_: _yn preswylio_
Dwin-dle, _dihoeni_, _diflanu_; _gwanychu_
Ear-ly, _cynnar_; _boreuol_; _yn gynnar_; _bore_
Earn-est, _difrifoldeb_; _difrif_, _diwyd_; _taer_
Earn-ing, _ennill_, _cyflog_; _ennilliad_
E-clipse, _diffyg_; _arguddiad_: _cymmylu_; _arguddio_
Ed-dy, _trobwll_; _adlif_: _dystroi_; _cylchdroi_
E-dict, _rheitharch_, _teyrnarch_, _cyhoeddiad_
Ef-face, _dilëu_, _anffurfio_, _dinystrio_; _tywyllu_
Ef-fect, _effaith_; _dyben_: _effeithio_; _dichon_
Ef-fects, _da_, _daodd_, _moddion_; _nwyddau_
Ei-ther, _un ór ddau_; _y ddau_; _naill ai_