-tum¹

Meaning

1. morphemeneuterused to form nouns from certain plant or tree names to denote a place where the species grows or is made to grow; grove, thicket, woods; orchard, plantation, -yard, garden
   cārex (“sedge”) + -tum → cārectum (“a sedge-bed”)
   frutex (“a shrub”) + -tum → frutectum (“a shrubbery, thicket”)

Origins

Nominalization of -tum (neuter singular forms of -tus (forming possessive adjectives)); the process from adjective to noun can still be seen in arbustus (“planted with trees”) → arbustum (“a place planted with trees, orchard”). Later widely supplanted by collateral -ētum. salictum/salicētum might suggest that other derivatives have been leveled through -ētum.

Meaning

1. morphemesuffix forming the accusative supine of verbs

Origins

See -tus (forming action nouns).