þagkjan

Verb type: irregular weak verb (1)
Present participle: þagkjands
(p þāhta) to think; to reason, consider, ponder (also þaggkjan)
Etymology
[← Prot-Germ *þankjan; OE þencan, þincan (Mod E think); O Fris thanka, thenza, thenka; O Sax thenkian; Dt denken OHG denken (Mod G denken); Icel þekkja ← Indo-Europ *tong-; cf Lat tongēre v “to know”]
Concordance
þankeiþ - 3 pers, sing, pres, indicat - Luk. XIV, 31
þaggkeiþ - 2 pers, pl, pres, indicat - Mrk. VIII, 17
þagkjai - 3 pers, sing, pres, optat - Cor. II, X, 7; X, 11
þagkjau - 1 pers, sing, pres, optat - Cor. II, I, 17
þagkjan - inf - Luk. V, 21; Cor. II, III, 5
þahta - 3 pers, sing, p, indicat - Luk. I, 29; IX, 7
þahtedun - 3 pers, pl, p, indicat - Mrk. VIII, 16; XI, 31; Luk. XX, 5; XX, 14
þagkjands - pres.p. - Mrk. II, 6; Luk. II, 19; III, 15; Jhn. XIII, 22
Paradigm

4.2.1. (b) I class weak irregular verbs

Some weak verbs of this class (e.g. brukjan (to use, employ), bugjan (to buy), þagkjan (to think), þugkjan (to think, consider; to seem); waúrkjan (to make, do; to work) and oth), whose stems ended in velar consonants k, ŋ, g, formed their past tense by means of the suffix -ta (while the verbal stem lost the marker of this class -j-); the combination of this velar consonat and the consonant -t of the suffix resulted in -ht-: bugjanbauhta, brūkjanbrūhta, waúrkjanwaúrhta. In addition, in verbs þagkjan, þugkjan [-ŋkjan], the nasal consonant -ŋ- was dropped and the stem vowel became lengthened, which resulted in the following past tense forms of these two verbs: þāhta and þūhta. The past tense of the verb borrowed from Greek kaupatjan (to buffet, slap) is kaupasta [<*kaupat + -ta].

Past tense/preterite forms of the preterite-present verbs have the same structure.

I class
irregular
infinitive preterite singular preterite plural past participle
to think þagkjan þāhta þāhtēdum þāhts
to make, do; to work waurkjan waurhta waurhtēdum waurhts

See the complete paradigm of the conjugation of weak verbs