411 REFERENCE · Wiktionary
-sio
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Appendix:Variations of "sio"
Latin
Suffix
-siō<3>
la -tiō takes this form when suffixed to primarily third conjugation verbs with stems ending in -t-, -d-, -rg-, -ll-, or -rr-