From Proto-West Germanic *falþan. The verb originally showed Grammatischer Wechsel with Germanic þ (OHG d) in the present and Germanic d (OHG t) in the past forms. However, this variation had already been levelled by Old High German times, yielding faldan alongside rarer faltan, each with normalised paradigms.
faldan
| infinitive | faldan | |
|---|---|---|
| indicative | present | past |
| 1st person singular | faldu, faldo | fiald |
| 2nd person singular | faldis, faldist | fialdi |
| 3rd person singular | faldit | fiald |
| 1st person plural | faldem, faldemēs | fialdum, fialdumēs |
| 2nd person plural | faldet | fialdut |
| 3rd person plural | faldant | fialdun |
| subjunctive | present | past |
| 1st person singular | falde | fialdi |
| 2nd person singular | faldēs, faldēst | fialdīs, fialdīst |
| 3rd person singular | falde | fialdi |
| 1st person plural | faldēm, faldemēs | fialdīm, fialdīmēs |
| 2nd person plural | faldēt | fialdīt |
| 3rd person plural | faldēn | fialdīn |
| imperative | present | |
| singular | fald | |
| plural | faldet | |
| participle | present | past |
| faldanti | gifaldan | |
From Proto-West Germanic *falþan, akin to Old English fealdan.
faldan
| infinitive | faldan | |
|---|---|---|
| indicative | present | past |
| 1st person singular | faldu | fēld |
| 2nd person singular | feldis | fēldi |
| 3rd person singular | feldid | fēld |
| plural | faldad | fēldun |
| subjunctive | present | past |
| 1st person singular | falde | fēldi |
| 2nd person singular | faldes | fēldis |
| 3rd person singular | falde | fēldi |
| plural | falden | fēldin |
| imperative | present | |
| singular | fald | |
| plural | faldad | |
| participle | present | past |
| faldandi | gifaldan, faldan | |