Attested in Patz §3.6.1 (grammar.md line 2790) and ex.(583); not in the source dictionary.
Based on the general interrogative root wanja but contains an opaque element -rri(y)- that Patz states cannot be analysed (§2.7, grammar.md line 2739), so treated as a distinct lexeme.
Added from the reference grammar (Patz); not present in the original community dictionary.