bīten, to waitbeitbitengebiten
swīgen, to be silentsweicswigengeswigen
trīben, to drivetreiptribengetriben

And similarly belīben, to remain, bīȥen, to bite, rīben, to rub, rīten, to ride, schīnen, to shine, schrīben, to write, sīgen, to sink, strīten, to quarrel.

snīden, to cutsneitsnitengesniten
dīhen, to thrivedēchdigengedigen
rīsen, to fallreisrirn (risen)gerirn (gerisen)

And similarly līden, to suffer, mīden, to avoid, nīden, to envy, līhen, to lend, zīhen, to accuse. See [§ 30].

[§ 77.] The following two verbs which are also used as weak verbs have mixed forms in the preterite and past participle:—

schrīen, to screamschrēschriuwengeschriuwen
schreischrūwengeschrūwen
schrirngeschrirn
spīwen, to vomitspēspiwengespiwen
speispiuwengespiuwen
spūwengespūwen
spirngespirn
Class II.

[§ 78.] The verbs of this class belong to the second ablaut-series ([§ 12]) and therefore have ie in the present, but iu in the present singular ([§ 16]); ou in the first and third pers. sing. of the preterite, but ō before t, ȥ, s and ch (= Germanic h), § 18; u in the pret. plural; and o in the past participle, thus:—

biegen, to bendbiugeboucbugengebogen
triefen, to droptriufetrouftruffengetroffen
bieten, to offerbiutebōtbutengeboten
schieȥen, to shootschiuȥeschōȥschuȥȥengeschoȥȥen

And similarly klieben, to cleave, kriechen, to creep, liegen, to lie, riechen, to smell, schieben, to shove, vliegen, to fly; dieȥen, to roar, gieȥen, to pour, vlieȥen, to flow.