UrsprungBy surface analysis, fet + -na.
Formerfetnar(present) · fetnade(preterite) · fetnat(supine) · fetna(imperative) · fetna(active, infinitive) · -(infinitive, passive) · fetnat(active, supine) · -(passive, supine) · fetna(active, imperative) · -(imperative, passive) · fetnen(active, archaic, error-unrecognized-form) · -(archaic, error-unrecognized-form, passive) · fetnar(active, indicative, present) · fetnade(active, indicative, past) · -(indicative, passive, present) · -(indicative, passive, past) · fetna(active, archaic, error-unrecognized-form, present) · fetnade(active, archaic, error-unrecognized-form, past) · -(archaic, error-unrecognized-form, passive, present) · -(archaic, error-unrecognized-form, passive, past)