close synonym of "deshalb" — "therefore, because of that". Actually more frequent in everyday speech. Position 1 + inversion.
Konjunktionaladverb kausal — Synonym zu deshalb; Position 1, Inversion.
Порядок слов
Hauptsatz 1 (Ursache)
Subj.
V = 2.
…
,
Das
Wetter
ist schlecht
,
Hauptsatz 2 mit deswegen (Folge)
Konj.-Adv.
V = 2.
Subj.
…
deswegen
bleiben
wir
zu Hause.
A Konjunktionaladverb takes POSITION 1 of the second clause, so the verb lands in 2nd and the subject is pushed after the verb (inversion). This is the key difference from coordinating conjunctions (und, aber, denn), which stand outside position 1.