Judg-ment, barn, barnedigaeth
Ju-ly, Gorphenaf
Junc-tion, cydiad; undeb
Junc-ture, cydiad; cysswllt
Ju-ry, rheithwyr
Jus-tice, cyfiawnder, barn; ynad, ustus
Keen-ness, craffder; gorawydd
Keep-er, ceidwad, gwarcheidwad
Keep-ing, cadwraeth
Ken-nel, ty cŵn; ffos budreddi