noun
singular and plural; simplicity and complexity; singles and doubles
A compound noun that pairs opposite concepts: singular vs. plural (grammar), simple vs. complex, or singles vs. doubles (sports). The specific meaning depends on context.
英語では名詞の単複に注意が必要だ。
In English, you need to pay attention to whether a noun is singular or plural.
この問題の単複を見極めるのは難しい。
It's difficult to determine whether this problem is simple or complex.
テニスの試合は単複両方で行われる。
The tennis tournament is held in both singles and doubles.
Loanword for 'singles' in sports. 単複 is a native compound that can refer to singles/doubles, but シングルス is more common in sports contexts.
Compound of 単 (simple, single) and 複 (complex, plural). The kanji directly convey the paired opposites.