-tor

• -sor (in forms derived from primarily third conjugation verbs with stems ending in -t-, -d-, -rg-, -ll-, or -rr-.)

From Proto-Italic *-tōr, from Proto-Indo-European *-tōr < *-tor-s. The ō from the nominative case was made common to all cases. Afterwards nom.sg. -tōr > -tor, by Latin sound laws. Paradoxically, as in other r-stems (soror, -or), in the resulting paradigm the one form with a short stem vowel is the only form whose stem was etymologically long.[1]

Cognate to Sanskrit: -तृ (-tṛ) (-ता sg (-tā, nom.)).

Cognate to Ancient Greek -τωρ (-tōr), as in δώτωρ (dṓtōr), and -τήρ (-tḗr), as in δοτήρ (dotḗr), from a separate ablaut *-tḗr (agentive suffix).

Compare Latin -trum (instrumental suffix), from Proto-Indo-European *-tr-o-m (instrumental suffix).

• (Classical) IPA^(key): /tor/, [tɔr]
• (Ecclesiastical) IPA^(key): /tor/

-tor m (genitive -tōris); third declension

1. -er; used to form a masculine agent noun

The suffix -tor is added to a verb to create a third-declension masculine form of an agent noun.

Examples:

cantor (“male singer”); masculine counterpart of cantrīx (“female singer”), from canō (“I sing”)

tōnsor (“male hair cutter”); masculine counterpart of tōnstrīx (“female hair cutter”), from tondeō (“I shear, shave”)

quadrātor (“stonecutter”), from quadrō (“I make square”)

The suffix -tor occasionally is added to a noun to create an agent noun.

Examples:

gladiātor (“gladiator”), from gladius (“sword”)

malleātor (“hammerer”), from malleus (“hammer”)

Third declension.

• -tōrium
• -tōrius

• -trīx

• IPA^(key): [tor]

From Latin -tor (through a Vulgar Latin form *-torius, and feminine -toare from *-toria). With some neologisms based off French -teur. Ultimately from Proto-Italic *-tōr, from Proto-Indo-European *-tōr < *-tor-s.

• -ător

-tor m or n (feminine singular -toare, masculine plural -tori, feminine and neuter plural -toare)

1. -er (used to form nouns from verbs)

   băutor - drinker

   călător - traveler

   făcător - maker

From Latin -tōrius.

• -ător

-tor m or n (feminine singular -toare, masculine plural -tori, feminine and neuter plural -toare)

1. -ing (used to form adjectives from verbs)

   uimitor - amazing

   strălucitor - shining

• -ar