単複同形

たんぷくどうけい

nouns whose plural has the same form as their singular (e.g. sheep)

単利(→複利)

たんり(→ふくり)

simple interest

単体複体

たんたいふくたい

simplicial complex

複複線

ふくふくせん

four-track rail line

複

ふく

diplo-, double

単

たん

single, simple

複素

ふくそ

complex (number)

複号

ふくごう

double sign (e.g. plusminus)

複塩

ふくえん

double salt

複数

ふくすう

several, plural, plurality, multiple

複雑

ふくざつ

complex, complicated, mixed (feelings)

重複

じゅうふく ちょうふく

duplication, repetition, overlapping, redundancy, restoration

複写

ふくしゃ

copy, duplicate

複合

ふくごう

composite, combined, complex

複勝

ふくしょう

placing bets

複音

ふくおん

compound note (on a harmonica)

複文

ふくぶん

sentence with an independent clause and at least one dependent clause

複方

ふくほう

compound drug

複葉

ふくよう

compound leaf, biplane