tridimensional

Etymology tree
Proto-Indo-European *tréyes
Proto-Indo-European *tri-
Proto-Italic *tri-
Latin tri-der.
English tri-
Proto-Indo-European *dwóh₁
Proto-Indo-European *d(w)is-
Proto-Italic *dis-
Latin dis-
Proto-Indo-European *meh₁-
Proto-Italic *mētis
Latin mētior
Latin dīmētior
Proto-Indo-European *-tis
Proto-Indo-European *-Hō
Proto-Indo-European *-tiHō
Proto-Italic *-tiō
Latin -tiō
Latin dīmēnsiōder.
English dimension
Proto-Indo-European *h₂el-der.?
Proto-Italic *-ālis
Latin -ālisbor.
Old French -albor.
▲
Latin -ālis
Old French -elbor.
▲
Latin -ālisbor.
Middle English -al
English -al
English dimensional
English tridimensional
From tri- + dimensional.