formal adversative "however". Stronger than "aber", predominantly written. Like every Konjunktionaladverb, triggers inversion. Can also sit mid-clause without inversion (then it's just an adverb).
Konjunktionaladverb adversativ — formell; Position 1 mit Inversion.
Порядок слов
Hauptsatz 1
Subj.
V = 2.
…
,
Der Preis
ist
hoch
,
Hauptsatz 2 mit jedoch (Gegensatz)
Konj.-Adv.
V = 2.
Subj.
…
jedoch
ist
die Qualität
ausgezeichnet.
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.