UrsprungOnomatopoeic. Compare German zirpen.
Formersirpar(present) · sirpade(preterite) · sirpat(supine) · sirpa(imperative) · sirpa(active, infinitive) · -(infinitive, passive) · sirpat(active, supine) · -(passive, supine) · sirpa(active, imperative) · -(imperative, passive) · sirpen(active, archaic, error-unrecognized-form) · -(archaic, error-unrecognized-form, passive) · sirpar(active, indicative, present) · sirpade(active, indicative, past) · -(indicative, passive, present) · -(indicative, passive, past) · sirpa(active, archaic, error-unrecognized-form, present) · sirpade(active, archaic, error-unrecognized-form, past) · -(archaic, error-unrecognized-form, passive, present) · -(archaic, error-unrecognized-form, passive, past)
Källa: Wiktionary