The story
- Latin · derived from‑tiōsus
- English today-tious
Rebracketed from words like fractious and presumptious, with the t from the base + -ious, ultimately from Latin ‑tiōsus, which is rebracketed from -t(us) + -i- + -ōsus.
Etymology from Wiktionary, CC BY-SA 4.0.