English
decisional
From decision + -al.
A compound of decision + -al
Proto-Indo-European *kh₂eyd- ‘to cut’
…
Proto-Italic *kaidō ‘to cut’
Latin caedō ‘to cut’
Latin dēcīdō ‘to decide’
Latin dēcīsiō ‘settlement’
English decision
Today it means
adj Of or pertaining to decisions.
Language periods are conventional ranges, not dates for this word.
Etymograph / decisional