HVORT
From Icelandic Parsed Historical Corpus (IcePaHC)
Usually tagged WQ, in which case it means "whether" and introduces an indirect question.
( (IP-MAT-SPE (NP-SBJ (PRO-N ég-ég)) (VBPI veit-vita) (NEG ekki-ekki) (, ,-,) (CP-QUE-SPE (WQ hvort-hvort) (C 0) (IP-SUB-SPE (NP-SBJ (PRO-N þið-þú)) (VBPI kannist-kanna) (PP (P við-við) (NP (PRO-A það-það))))) (. ;-;)) (ID PILTUR,.1305))
HVORT SEM
See CP-QUE#Adverbial_WHETHER_questions_.28CP-QUE-ADV.29 Adverbial.
HVORT ... EÐA
See WHETHER OR NO(T) in PPCEME.