Useful english dictionary. 2012.
irrigably — ir·ri·ga·bly … English syllables
irrigable — irrigably, adv. /ir i geuh beuhl/, adj. capable of being irrigated. [1835 45; IRRIG(ATE) + ABLE] * * * … Universalium
irrigable — adjective Able to be irrigated. See Also: irrigably … Wiktionary