English
irrigational
From irrigation + -al.
Formed from irrigation + -al
Proto-Italic *rigā- ‘to lead toward’
Latin rigō ‘to irrigate, to lead, convey or conduct’
Latin irrigō ‘to water or irrigate’
Latin irrigatio ‘watering, irrigation’
Middle French irrigation
English irrigation
Today it means
adj Of or pertaining to irrigation.
Language periods are conventional ranges, not dates for this word.
Etymograph / irrigational