Ursprungbi- + dra, from German beitragen.
Formerbidrar(present) · bidrog(preterite) · bidragit(supine) · bidra(imperative) · bidra(active, infinitive) · -(infinitive, passive) · bidragit(active, supine) · -(passive, supine) · bidra(active, imperative) · -(imperative, passive) · bidran(active, archaic, error-unrecognized-form) · -(archaic, error-unrecognized-form, passive) · bidrar(active, indicative, present) · bidrog(active, indicative, past) · -(indicative, passive, present) · -(indicative, passive, past) · bidra(active, archaic, error-unrecognized-form, present) · bidrogo(active, archaic, error-unrecognized-form, past) · -(archaic, error-unrecognized-form, passive, present) · -(archaic, error-unrecognized-form, passive, past)