a suffix originally occurring in adjectives borrowed from Latin (fictitious); on this model, used with stems of other origin (bumptious).
How To Use Common Punctuation MarksA discussion of each mark follows, in alphabetical order by name of mark. Also includes how to divide words; use of numerals/numbers; possessives; and common errors in punctuation. Apostrophe (‘) is used to indicate possession, contractions, and plurals. Possession: The possessive form of singular nouns ends in ‘s, including nouns ending in s, x, z, ch, or sh. For example: a dog’s life, a lass’s smile. The apostrophe …
Origin of -tious
< Latin -tiōsus, equivalent to -t(us) past participle suffix + -iōsus -ious
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019