Комментарии:EDT 373, Ашм. X, 4-5, Федотов 1, 449-450. The OT form is usually regarded as derived from *bas- 'to press' (v. sub *pằsi), but external evidence suggests that this is one of the numerous inner Turkic folk-etymological reinterpretations. Chuv. pus "copec" needs some additional comments. According to Егоров 166 it can either be derived from pus- 'break' < Turk. *bas- (according to Zolotnitski), or be borrowed from Pers. pōst "skin" > Tur. post, Uzb. pust 'id.' (Turkic forms see in VEWT 386). The latter hypothesis is rather improbable because the form means 'coin' only in Chuv., and because this borrowing is absent in other languages of the Volga region. VEWT 387 suggests Chuv. pus < Mari puš 'debt, tax' < pu- 'give'. The word is absent from the Mari dictionary, one only finds пуышаш 'arrears'; cf., on the other hand, Udm. pus 'sign, subscription' < Chuv. puzǝ id. < pus- 'to press'. This etymology is, therefore, equally dubious, and our equation of Chuv. pus = OT basɨɣ seems preferable.