Gwrthwyneb, n. contrariety; nausea
Gwrthwynebadwy, a. that may be opposed, resistible
Gwrthwynebiad, a. opposition, confrontation
Gwrthwynebrwydd, opposedness
Gwrthwynebu, v. to resist, to oppose; to confront
Gwrthwynebus, a. tending to turn against, disgusting
Gwrthwynebwr, n. an opposer, an adversary
Gwrthwynt, n. an adverse wind
Gwrthymchwel, n. a reverting or coming back
Gwrthymdrech, n. oppugnancy