verb
to move house, to change clothes
A1
Umziehen: can mean 'to move house' (change residence) or 'to change clothes.' It's a separable, strong (irregular) verb: zieh-/zog-/umgezogen. Auxiliary: uses sein when intransitive (Ich bin umgezogen = I moved house), but haben when used transitively (Er hat das Kind umgezogen = he dressed the child).
Examples
Nächste Woche ziehen wir in eine neue Wohnung um.
Next week we're moving into a new flat.
Letzte Woche sind wir umgezogen.
We moved last week.
Er ist schon dreimal umgezogen.
He has already moved three times.
Details
Mnemonics
a person pulling boxes 'um' and changing shirts
sounds like 'um-zee-gen' — imagine zipping up boxes to move
Notes
Separable verb: in present tense the prefix 'um' separates (ich ziehe um). When meaning 'move house' it typically uses the auxiliary 'sein' in perfect tenses (ich bin umgezogen). Konjunktiv I Präteritum forms are not applicable / not used in modern German. Passive is applicable only for transitive uses; when used intransitively ('move house') passive is not usually relevant.