whereof
UK /wɛəɹˈɒv/ · US /(h)wɛɹˈʌv/ conjunction, adverb
- conjunction (formal) Of what.
- conjunction (formal) Of which.
- conjunction (formal) Of whom.
- conjunction (archaic) With or by which.
- adverb (archaic) Of what.
- adverb (archaic) Of which.
Etymology
From Middle English wherof; equivalent to where + of. Compare the parallel formations of Swedish varav and Dutch waaraf.
Webster’s 1913
- adverb Of which; of whom; formerly, also, with which; --used relatively.
- adverb Of what; --used interrogatively.
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “whereof”, CC BY-SA 4.0. Details