An adverbial complementizer is a morpheme that introduces a subordinate, adverbial clause.  This property refers to both independent words and affixal complementizers.  In some languages, the adverbial complementizer occurs inside the subordinate clause, instead of initially or finally.  One example from Nkore-Kiga is <i>wa-kami obu y-aa-tuuriza enjojo</i> 'Mr.-rabbit when he-today.pst-challenge elephant,' meaning "when Brer Rabbit challenged the elephant."

<br><br><b>Reference</b><br>
Dryer, Matthew S.. 2008. Order of Adverbial Subordinator and Clause.
In Haspelmath et al (2008), chapter 94.
Available online at <a href="http://wals.info/feature/94">http://wals.info/feature/94</a href>.

