(forming nouns) equivalent to -ATION (as in comparison, jettison)
（构成名词）相当于-ATION（如在comparison, jettison中）。
词源
from Old French -aison, -eison, etc., from Latin -atio（n）-.
-isonsuffix of ns., repr.OF.-aison, -eison, -eson, -ison:—L. -ātiōn-em (at a later date adopted in the learned form -ation, which is thus a doublet of -ison), -etiōnem, -itiōnem. Examples comparison, fermison, garrison, jettison, orison, venison, warnison.Benison and malison represent OF.beneīçon (later benisson) and maleïçon, from L. bene-, maledictionem. Caparison is only attracted into this class. In reason and season, the suffix has, under the stress, retained a different form; so in treason:—OF.traïsun:—L. tradition-em. See also inheriteson. All these, with poison (:—L. pōtiōnem), etc., are really particular cases of a suffix -son for L. -tiōnem.
-ison/ɪs(ə)n/suffix.Repr. Old French -aison, -eison, -eson, -ison, Latin -atio(n-) (later adopted in the learned form -ation), -etio(n-), -itio(n-), in nouns, as comparison, jettison, orison, venison.