単たん複ぷく同どう形けいMeaningsNoun1. same singular and plural form (of a noun; e.g. sheep)Kanji used単single複multiple同same形shapeComposed of単たん複ぷくsimplicity and complexity; singular and plural; single and double; singles and doubles (in tennis)Noun同どうthe same; the said; likewisePrefix形けいform; adjective; i-adjective (in Japanese)Suffix