Use the root search when you want to filter the roots by some specific criteria. It acts as a convenient shortcut for the more advanced search syntax (below).
j/wto match either a j or a w
'indicates a missing radical, in irregular roots.
Queries follow regular expression syntax:
.matches any single letter (including ie and għ)
^matches beginning of string
$matches the end of string
+matches 1 or more repetitions of the previous expression
*matches 0 or more repetitions of the previous expression
?matches 0 or 1 occurances of the previous expression