Diofaledd, n. carelessness
Diofalu, v. to become careless; to make secure
Diofalus, a. negligent
Diofalwch, n. negligence
Diofer, a. not vain or useless
Diofid, a. without affliction
Diofryd, n. vow; decision
Diofrydiad, n. a vowing
Diofrydog, a. vowed; devoted
Diofyn, a. undaunted, fearless