S1U1F4F4I1X8I1N1G2
23 points
SUFFIXING is validvalid
SUFFIX, to add as a form affixed to the end of end of word [v]
SUFFIX, to add to the end of a root word [v]
SUFFIX, to add as a form affixed to the end of end of word [v]
SUFFIX, to add to the end of a root word [v]