adaptitude

Etymology tree
Proto-Indo-European *h₂éd
Proto-Italic *ad
Proto-Italic *ad-
Latin ad-
Proto-Italic *aptos
Latin aptus
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-yéti
Proto-Indo-European *-eh₂yéti
Proto-Italic *-āō
Latin -ō
Latin apiō
Proto-Indo-European *-tós
Proto-Italic *-tos
Latin -tus
▲
Latin -ō
Latin -tō
Latin aptō
Latin adaptōder.
Middle English *adapten
English adapt
Proto-Indo-European *-tu-
Proto-Indo-European *-d-
Proto-Indo-European *-Hō
Proto-Italic *tūdō
Latin -tūdō
Middle French -itudebor.
English -itude
English adaptitude
Circa 1800 adapt + -itude