形相因 けいそういん Meanings Noun formal cause (one of Aristotle's four fundamental types of answer to the question "why?") See also: 質料因 (しつりょういん). See also: 作用因 (さよういん). See also: 目的因 (もくてきいん). Kanji 形 shape. Read as ケイ. 相 mutual. Read as ソウ. 因 cause. Read as イン. Word lists Philosophy Jinuma: Japanese Dictionary · Word lists