reconstructive

Etymology tree
Proto-Italic *wre-
Latin re-der.
Old French re-bor.
Middle English re-
English re-
Proto-Indo-European *ḱe?
Proto-Indo-European *ḱóm
Proto-Italic *kom
Proto-Italic *kom-
Latin con-
Proto-Indo-European *ster-
Proto-Indo-European *sterh₃-
Proto-Indo-European *strew-
Proto-Indo-European *-eti
Proto-Indo-European *stréweti
Proto-Italic *strowō
Latin struō
Latin cōnstruōder.
Latin cōnstrūctusbor.
English construct
English reconstruct
Proto-Indo-European *-wós
Proto-Indo-European *-iHwósder.
Latin -īvus
Old French -ifbor.
Middle English -yf
English -ive
English reconstructive
From reconstruct + -ive.