From Double + -n. In the verb, the /əl/ syllable must be respelt phonetically; compare googeln from Google.
doubeln (weak, third-person singular present doubelt, past tense doubelte, past participle gedoubelt, auxiliary haben)
infinitive | doubeln | ||||
---|---|---|---|---|---|
present participle | doubelnd | ||||
past participle | gedoubelt | ||||
auxiliary | haben | ||||
indicative | subjunctive | ||||
singular | plural | singular | plural | ||
present | ich double ich doubele ich doubel |
wir doubeln | i | ich doubele ich double |
wir doubeln |
du doubelst | ihr doubelt | du doubelest du doublest |
ihr doubelet ihr doublet | ||
er doubelt | sie doubeln | er doubele er double |
sie doubeln | ||
preterite | ich doubelte | wir doubelten | ii | ich doubelte1 | wir doubelten1 |
du doubeltest | ihr doubeltet | du doubeltest1 | ihr doubeltet1 | ||
er doubelte | sie doubelten | er doubelte1 | sie doubelten1 | ||
imperative | double (du) doubel (du) doubele (du) |
doubelt (ihr) |
1Rare except in very formal contexts; alternative in würde normally preferred.