word-forming element of Greek origin, used from mid-19c. and meaning "rapid, swift, fast," from Latinized combining form of Greek takhys "swift, rapid, hasty," related to takhos "speed, swiftness," a word of uncertain origin (Beekes: "The etymology remains unclear.").
word-forming element of Greek origin meaning "speed," often short for tachometer, ultimately from Latinized form of Greek takhos "speed, swiftness, fleetness, velocity," which Beekes calls a derivative of takhys "swift," a word of unknown origin.
word-forming element making cardinal numbers from 13 to 19, meaning "ten more than," from Old English -tene, -tiene, from Proto-Germanic *tekhuniz (cognates: Old Saxon -tein, Dutch -tien, Old High German -zehan, German -zehn, Gothic -taihun), an inflected form of the root of ten; cognate with Latin -decim (source of Italian -dici, Spanish -ce, French -ze).
before vowels terat-, word-forming element of Greek origin, used from 19c. and meaning "marvel, monster," from combining form of Greek teras (genitive teratos) "marvel, sign, wonder, monster."
This is reconstructed to be from PIE *kewr-es-, from root *kwer- "to make, form" (source also of Sanskrit krta- "make, do, perform," Lithuanian keras "charm," Old Church Slavonic čaru "charm").
suffix forming nouns of action, state, or quality from verbs or adjectives (such as birth, bath, depth, death, growth, strength, truth, math (n.2)), from Old English -ðu, -ð, from Proto-Germanic *-itho (cognates: Old Norse -þ, Old High German -ida, Gothic -iþa), abstract noun suffix, from PIE *-ita (cognates: Sanskrit -tati-; Greek -tet-; Latin -tati-, as in libertatem "liberty" from liber "free").
Sometimes in English reduced to -t, especially after -h- (as in height). Formerly more widespread (Middle English had stilþe "silence," c. 1200), and in recent centuries often tempting authors to new coinages (17c. swelth "swelling;" Ruskin's illth).
word-forming element making ordinal numbers (fourth, tenth, etc.), Old English -ða, from Proto-Germanic *-tha- (cognates: Gothic -da, -ta, Old High German -do, -to, Old Norse -di, -ti), from PIE *-to-, also *-eto-, *-oto-, suffix forming adjectives "marking the accomplishment of the notion of the base" [Watkins].
Cognate with Sanskrit thah, Greek -tos, Latin -tus; Sanskrit ta-, Lithuanian and Old Church Slavonic to, Greek to "the," Latin talis "such;" Greek tēlikos "so old, of such an age," Old Church Slavonic toli "so, to such a degree," toliku "so much," Russian toliko "only;" also see -ed.
a syllable occurring in many nouns of Latin origin, formed when the word-forming element -ion (from Latin -ionem, -io) is fixed to a base or to another suffix ending in -t or -te.
In Latin, after radical -s- the -tion is regularly -sion (compare mission, passion). In Middle English, in words via Old French, it often was -cion, later regularized to -tion (in coercion and suspicion, however, the -c- belongs to the base).
word-forming element meaning "a cutting" (especially a surgical incision or removal), from Greek -tomia "a cutting of," from tome "a cutting, section" (from PIE root *tem- "to cut").
